Extra-strength Moving Boxes in Moving Boxes

Uses item details. Price when purchased online

ShippingSuppliesByMail Corrugated Boxes, ECT-32, Extra Strength, Recycled, 24 x 15 x 12 Inches, Brown, Pack of 20 $89.20

ShippingSuppliesByMail Corrugated Boxes, ECT-32, Extra Strength, Recycled, 24 x 15 x 12 Inches, Brown, Pack of 20
Sponsored
current price $89.20

ShippingSuppliesByMail Corrugated Boxes, ECT-32, Extra Strength, Recycled, 24 x 15 x 12 Inches, Brown, Pack of 20

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

ShippingSuppliesByMail Extra Strength Durable Corrugated Boxes ECT-32, 25 per Case $73.18

ShippingSuppliesByMail Extra Strength Durable Corrugated Boxes ECT-32, 25 per Case
Sponsored
current price $73.18

ShippingSuppliesByMail Extra Strength Durable Corrugated Boxes ECT-32, 25 per Case

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

25 - 24x12x12 44 ECT New Corrugated Boxes $116.50

25 - 24x12x12 44 ECT New Corrugated Boxes
Sponsored
current price $116.50
Options from $35.15

25 - 24x12x12 44 ECT New Corrugated Boxes

Free shipping, arrives in 3+ days

12x12x12 Medium Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $19.95

12x12x12 Medium Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
Available in additional 2 options
current price $19.95
Options from $19.95 – $57.95

12x12x12 Medium Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

5 out of 5 Stars. 4 reviews
Free shipping, arrives in 3+ days

24x24x24 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $41.95

24x24x24 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
Available in additional 2 options
current price $41.95
Options from $41.95 – $167.95

24x24x24 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

4 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

ShippingSuppliesByMail Corrugated Boxes, ECT-32, Extra Strength, Recycled, 24 x 15 x 12 Inches, Brown, Pack of 20 $89.20

ShippingSuppliesByMail Corrugated Boxes, ECT-32, Extra Strength, Recycled, 24 x 15 x 12 Inches, Brown, Pack of 20
current price $89.20

ShippingSuppliesByMail Corrugated Boxes, ECT-32, Extra Strength, Recycled, 24 x 15 x 12 Inches, Brown, Pack of 20

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

16x16x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $23.95

16x16x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
Available in additional 2 options
current price $23.95
Options from $23.95 – $85.95

16x16x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

4.5 out of 5 Stars. 8 reviews
Free shipping, arrives in 3+ days

Kidsol Heavy Duty Moving Bags with Zippers and Handles, Storage Bags for Space Saving and Packing, Collapsible Moving Supplies, Storage Totes (93L, 4-Pack, Black) $22.99

Kidsol Heavy Duty Moving Bags with Zippers and Handles, Storage Bags for Space Saving and Packing, Collapsible Moving Supplies, Storage Totes (93L, 4-Pack, Black)
current price $22.99

Kidsol Heavy Duty Moving Bags with Zippers and Handles, Storage Bags for Space Saving and Packing, Collapsible Moving Supplies, Storage Totes (93L, 4-Pack, Black)

4.6 out of 5 Stars. 127 reviews
Free shipping, arrives in 3+ days

18x16x14 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5) $29.95

18x16x14 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)
Available in additional 2 options
current price $29.95
Options from $29.95 – $93.95

18x16x14 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)

Free shipping, arrives in 3+ days

8x8x8 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $15.95

8x8x8 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
Available in additional 2 options
current price $15.95
Options from $15.95 – $41.95

8x8x8 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

Free shipping, arrives in 3+ days

4 Cup Carrier - Eco Friendly Heavy Duty Kraft Corrugate Paperboard Carrier $13.99 Was $19.89

4 Cup Carrier - Eco Friendly Heavy Duty Kraft Corrugate Paperboard Carrier
Available in additional 2 options
current price Now $13.99, Was $19.89
Options from $13.99 – $24.99

4 Cup Carrier - Eco Friendly Heavy Duty Kraft Corrugate Paperboard Carrier

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

14x14x14 Medium Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $21.95

14x14x14 Medium Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
Available in additional 2 options
current price $21.95
Options from $21.95 – $71.95

14x14x14 Medium Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

3.5 out of 5 Stars. 2 reviews
Free shipping, arrives in 3+ days

EPE USA Universal Laptop Shipping Box, FedEx/UPS/ISTA Certified, Fits Most Laptop Screen Sizes, theBOXlarge $17.99

EPE USA Universal Laptop Shipping Box, FedEx/UPS/ISTA Certified, Fits Most Laptop Screen Sizes, theBOXlarge
current price $17.99

EPE USA Universal Laptop Shipping Box, FedEx/UPS/ISTA Certified, Fits Most Laptop Screen Sizes, theBOXlarge

4.6 out of 5 Stars. 38 reviews
Save with
Walmart Plus
Shipping arrives Mon, Feb 23

20x20x20 Large Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (25) $137.95

20x20x20 Large Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (25)
Available in additional 2 options
current price $137.95

20x20x20 Large Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (25)

3.7 out of 5 Stars. 9 reviews
Free shipping, arrives in 3+ days

Cell Phone Shipping Box, Cell Phone Mailing Box, Fits Most Cell Phone Devices, theBOXsmall $9.98

Cell Phone Shipping Box, Cell Phone Mailing Box, Fits Most Cell Phone Devices, theBOXsmall
current price $9.98

Cell Phone Shipping Box, Cell Phone Mailing Box, Fits Most Cell Phone Devices, theBOXsmall

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

ShippingSuppliesByMail Extra Strength Durable Corrugated Boxes ECT-32, 25 per Case $73.18

ShippingSuppliesByMail Extra Strength Durable Corrugated Boxes ECT-32, 25 per Case
current price $73.18

ShippingSuppliesByMail Extra Strength Durable Corrugated Boxes ECT-32, 25 per Case

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

22x22x22 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $49.95

22x22x22 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
current price $49.95

22x22x22 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

Free shipping, arrives in 3+ days

EPE USA 11.68" x 17.25" x 3.75" Laptop Shipping Box (LTC-S004-01) $23.95

EPE USA 11.68" x 17.25" x 3.75" Laptop Shipping Box (LTC-S004-01)
Available in additional 3 options
current price $23.95
Options from $23.95 – $224.99

EPE USA 11.68" x 17.25" x 3.75" Laptop Shipping Box (LTC-S004-01)

4.2 out of 5 Stars. 6 reviews
Free shipping, arrives in 3+ days

12x10x8 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5) $19.95

12x10x8 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)
Available in additional 2 options
current price $19.95
Options from $19.95 – $47.95

12x10x8 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)

Free shipping, arrives in 3+ days

Box Partners Heavy-Duty Boxes 12" x 12" x 10" Kraft 25/Bundle HD121210 $100.95

Box Partners Heavy-Duty Boxes 12" x 12" x 10" Kraft 25/Bundle HD121210
current price $100.95

Box Partners Heavy-Duty Boxes 12" x 12" x 10" Kraft 25/Bundle HD121210

Free shipping, arrives in 3+ days

9x7x5 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (25) $33.95

9x7x5 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (25)
Available in additional 2 options
current price $33.95
Options from $17.95

9x7x5 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (25)

Free shipping, arrives in 3+ days

10x10x10 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 5 $26.00

10x10x10 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 5
Available in additional 10 options
current price $26.00
Options from $26.00 – $486.81

10x10x10 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 5

Free shipping, arrives in 3+ days

22x18x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5) $33.95

22x18x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)
Available in additional 2 options
current price $33.95
Options from $33.95 – $119.95

22x18x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)

5 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

16x12x8 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 10 $47.71

16x12x8 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 10
Available in additional 9 options
current price $47.71
Options from $35.90

16x12x8 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 10

Free shipping, arrives in 3+ days

22x22x22 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5) $37.95

22x22x22 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)
Available in additional 2 options
current price $37.95
Options from $37.95 – $149.95

22x22x22 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (5)

Free shipping, arrives in 3+ days

18x14x6 Corrugated Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce Qty 5 $23.95

18x14x6 Corrugated Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce Qty 5
Available in additional 2 options
current price $23.95
Options from $23.95 – $65.95

18x14x6 Corrugated Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce Qty 5

3.7 out of 5 Stars. 3 reviews
Free shipping, arrives in 3+ days

Box Partners Double Wall Bxs,24x16x16,Kraft,10/BDL - BXP HD241616DW $77.76

Box Partners Double Wall Bxs,24x16x16,Kraft,10/BDL - BXP HD241616DW
current price $77.76
+$15.99 shipping

Box Partners Double Wall Bxs,24x16x16,Kraft,10/BDL - BXP HD241616DW

Shipping arrives in 3+ days

Partners Brand 20" x 20" x 10" Heavy-Duty Double Wall Boxes 48 ECT Kraft 10/Bundle (HD202010DW) $101.46

Partners Brand 20" x 20" x 10" Heavy-Duty Double Wall Boxes 48 ECT Kraft 10/Bundle (HD202010DW)
current price $101.46

Partners Brand 20" x 20" x 10" Heavy-Duty Double Wall Boxes 48 ECT Kraft 10/Bundle (HD202010DW)

Free shipping, arrives in 3+ days

48" x 40" x 48" Gaylord Bottoms Brown 5/Bundle (GL484048DW) $591.30

48" x 40" x 48" Gaylord Bottoms Brown 5/Bundle (GL484048DW)
current price $591.30

48" x 40" x 48" Gaylord Bottoms Brown 5/Bundle (GL484048DW)

Free shipping, arrives in 3+ days

Box Partners Double Wall Boxes 12" x 9" x 6" Kraft 15/Bundle HD1296DW $31.93 Was $54.99

Box Partners Double Wall Boxes 12" x 9" x 6" Kraft 15/Bundle HD1296DW
current price Now $31.93, Was $54.99

Box Partners Double Wall Boxes 12" x 9" x 6" Kraft 15/Bundle HD1296DW

Free shipping, arrives in 3+ days

20x20x12 Kraft Brown Corrugated Shipping Boxes, 48 ECT Double-Wall, Qty 5 $168.13

20x20x12 Kraft Brown Corrugated Shipping Boxes, 48 ECT Double-Wall, Qty 5
Available in additional 3 options
current price $168.13
Options from $168.13 – $251.30

20x20x12 Kraft Brown Corrugated Shipping Boxes, 48 ECT Double-Wall, Qty 5

Free shipping, arrives in 3+ days

20x20x20 Large Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (25) $137.95 Was $154.95

20x20x20 Large Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (25)
Available in additional 2 options
current price Now $137.95, Was $154.95

20x20x20 Large Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping (25)

Free shipping, arrives in 3+ days

Bankers Box SmoothMove Moving Storage Box- Extra Strength- Medium- 18w x 18d x 16h- Kraft $69.32

Bankers Box  SmoothMove Moving Storage Box- Extra Strength- Medium- 18w x 18d x 16h- Kraft
current price $69.32
+$12.49 shipping

Bankers Box SmoothMove Moving Storage Box- Extra Strength- Medium- 18w x 18d x 16h- Kraft

Shipping arrives in 3+ days

Packaging Medium Moving & Shipping Boxes Extra Strength 200 lb vs Regular Corrugated Boxes, 14 x 10 x 8, 5 Count, 25 Pack $32.99

Packaging Medium Moving & Shipping Boxes Extra Strength 200 lb vs Regular Corrugated Boxes, 14 x 10 x 8, 5 Count, 25 Pack
Available in additional 2 sizes
current price $32.99
Options from $32.99 – $109.99

Packaging Medium Moving & Shipping Boxes Extra Strength 200 lb vs Regular Corrugated Boxes, 14 x 10 x 8, 5 Count, 25 Pack

1 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

PACKKA Packaging boxes of cardboard,Small Cube Moving & Shipping Boxes 7 x 7 x 7 inches (5-Pack) - Extra Strength 200 lb vs Regular Boxes $18.99

PACKKA Packaging boxes of cardboard,Small Cube Moving & Shipping Boxes 7 x 7 x 7 inches (5-Pack) - Extra Strength 200 lb vs Regular Boxes
current price $18.99

PACKKA Packaging boxes of cardboard,Small Cube Moving & Shipping Boxes 7 x 7 x 7 inches (5-Pack) - Extra Strength 200 lb vs Regular Boxes

Free shipping, arrives in 3+ days

24x18x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5) $35.95

24x18x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)
current price $35.95

24x18x16 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)

1 out of 5 Stars. 1 reviews
Free shipping, arrives in 3+ days

Partners Brand 16" x 12" x 10" Heavy-Duty Double Wall Boxes 48 ECT Kraft 15/Bundle (HD161210DW) $75.50

Partners Brand 16" x 12" x 10" Heavy-Duty Double Wall Boxes 48 ECT Kraft 15/Bundle (HD161210DW)
current price $75.50

Partners Brand 16" x 12" x 10" Heavy-Duty Double Wall Boxes 48 ECT Kraft 15/Bundle (HD161210DW)

Free shipping, arrives in 3+ days

Box Partners Heavy-Duty Boxes 10" x 8" x 6" Kraft 25/Bundle HD1086 $58.07

Box Partners Heavy-Duty Boxes 10" x 8" x 6" Kraft 25/Bundle HD1086
current price $58.07

Box Partners Heavy-Duty Boxes 10" x 8" x 6" Kraft 25/Bundle HD1086

Free shipping, arrives in 3+ days

20x20x12 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 5 $160.21

20x20x12 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 5
Available in additional 5 options
current price $160.21
Options from $160.21 – $296.15

20x20x12 Kraft Brown Corrugated Shipping Boxes, 44 ECT Single-Wall, Qty 5

Free shipping, arrives in 3+ days

18x14x10 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5) $25.95

18x14x10 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)
Available in additional 2 options
current price $25.95
Options from $25.95 – $77.95

18x14x10 Moving & Shipping Boxes, Extra Strength, Heavy-Duty Corrugated Cardboard Boxes for Packing, Storage, Shipping, Transport, Commerce (5)

Free shipping, arrives in 3+ days

2PK Duck Heavy Duty Box, 16" x 16" x 15", Brown, 1 Each $55.77

2PK Duck Heavy Duty Box, 16" x 16" x 15", Brown, 1 Each
current price $55.77

2PK Duck Heavy Duty Box, 16" x 16" x 15", Brown, 1 Each

Free shipping, arrives in 3+ days

Bankers Box FEL SmoothMove Moving-Storage Box Extra Strength Small 12w x 12d x 16h Kraft $51.04

Bankers Box FEL SmoothMove Moving-Storage Box  Extra Strength  Small  12w x 12d x 16h  Kraft
current price $51.04
+$12.49 shipping

Bankers Box FEL SmoothMove Moving-Storage Box Extra Strength Small 12w x 12d x 16h Kraft

Shipping arrives in 3+ days

EPE USA 14.25 x 11.75 x 2 Tablet Shipping Box (LTC-S002-01) $15.99

EPE USA 14.25 x 11.75 x 2 Tablet Shipping Box (LTC-S002-01)
current price $15.99

EPE USA 14.25 x 11.75 x 2 Tablet Shipping Box (LTC-S002-01)

3.7 out of 5 Stars. 3 reviews
Free shipping, arrives in 3+ days

FAQ

How can I tell if a moving box is strong enough for heavy items?

When choosing moving boxes for heavy items, look for features like extra strength and heavy-duty corrugated cardboard. Boxes with a higher Edge Crush Test (ECT) rating, such as 44 ECT or 48 ECT, indicate better durability and stacking strength. Also, check the box's thickness and the number of layers of cardboard. Boxes labeled as heavy-duty or extra strength are designed to handle heavier loads and provide better protection during moves or shipping.

What's the best way to reinforce a moving box for fragile items?

To reinforce a moving box for fragile items, start by using packing tape along all seams and edges, applying multiple layers if needed. Adding bubble wrap or packing paper inside cushions the contents. You can also reinforce the bottom of the box with extra cardboard pieces for added support. Label the box clearly as fragile to ensure careful handling. These steps help protect delicate items and reduce the risk of damage during transport.

How do I choose the right size moving box for different items?

Choosing the right box size depends on what you're packing. Small boxes work well for heavy items like books or tools, making them easier to carry. Medium and large boxes are better for lighter, bulkier items like pillows, linens, or clothing. Avoid overpacking large boxes with heavy items to prevent damage. Consider the dimensions listed for each box and match them to your belongings to optimize space and protect your items during the move.

How many layers of tape should I use to secure a moving box?

For securing moving boxes, it's generally recommended to apply at least two to three layers of packing tape along the bottom and top seams. Use the H-taping method, which means taping along the center seam and both edges of the box flaps to create a secure seal. This helps prevent the box from opening during transport and adds extra strength to the structure. Using quality packing tape also improves durability.

What does the Edge Crush Test (ECT) rating mean for moving boxes?

The Edge Crush Test (ECT) rating measures the strength of corrugated cardboard by testing how much pressure it can withstand on its edges. A higher ECT number, like 44 or 48, indicates stronger cardboard that can better resist crushing and stacking pressure. This rating helps you understand how well a box will hold up when stacked or carrying heavy items. Boxes with higher ECT ratings are usually recommended for moving and shipping to ensure better protection.

Show less