Hero image 0 of 37" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 36-2, 0 of 7
37" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 36-2
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37" Caldwell Series 300 5/8" Channel Block & Tackle Window Balance - Stamp 36-237 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 36 237 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 36 137 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 36 537 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 36 437 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 36 337 Caldwell Series 300 5 8 Channel Block Tackle Window Balance Stamp 36 9
Size:36-2 (13-18 lbs)
Actual Color:Metal
Key item features
- ENGINEERED FOR NON-TILT WINDOWS – Designed for side-load, non-tilt window systems with a standard 5/8″ metal channel, commonly used in vinyl and aluminum single- or double-hung frames. This balance measures 37" inches in length and supports 13-18 lbs sashes. Each balance arrives pre-assembled with top and bottom guides attached, so installation is fast and frustration-free—no special tools required.
- AVAILABLE IN LENGTHS FROM 8″ TO 49″ (3 TO 44 LB RANGE) – The Series 300 fits nearly all non-tilt window sizes, from light residential sashes to heavy commercial frames. Covers a complete range of lengths and weight ratings for versatile use. Each balance is precision-tested for smooth, reliable performance and long-term durability. Sold individually; accessories and hardware not included. Contact WRS if your exact size isn’t listed.
- SMOOTH, SAFE & SECURE OPERATION – The Series 300’s precision pulley and spring system balances the sash to prevent slamming or sticking, keeping windows steady at any height. Designed for quiet, reliable performance in homes, schools, and offices where safety and ease of use matter every day.
- HEAVY-DUTY GALVANIZED STEEL CONSTRUCTION – Crafted from high-strength galvanized steel for long-term durability and corrosion resistance. Precision pulleys and springs maintain smooth lift through thousands of cycles, ensuring reliable performance for years of daily use. Built tough for pros yet simple enough for DIY installation.
- TRUSTED SINCE 1989 – WRS Window Repair Systems has over 30 years of experience supplying reliable, high-quality hardware. Trusted nationwide by homeowners, contractors, schools, and property managers for dependable repairs and long-lasting performance.
Specs
- Size36-2 (13-18 lbs)
- MaterialMaterial
- BrandWRS
- Has written warrantyNo
Current price is USD$13.39
Price when purchased online
- Free shipping
Free 30-day returns
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Sold and shipped by Wholesale Product Supply
4.735294117647059 stars out of 5, based on 34 seller reviews(4.7)34 seller reviews
Free 30-day returns
About this item
Product details
The 300 Series is a standard block and tackle window balance for sideload / non-tilt window applications. 5/8" Channel Depth. To measure the balance, measure the length of the metal channel only. Balances include standard non-winged top and bottom guides. Includes the balance and pre-installed top and bottom guides only. No other parts are included. If you have questions, contact us before purchasing. If your metal channel does not match exactly, please contact us before you place your order.
- ENGINEERED FOR NON-TILT WINDOWS – Designed for side-load, non-tilt window systems with a standard 5/8″ metal channel, commonly used in vinyl and aluminum single- or double-hung frames. This balance measures 37" inches in length and supports 13-18 lbs sashes. Each balance arrives pre-assembled with top and bottom guides attached, so installation is fast and frustration-free—no special tools required.
- AVAILABLE IN LENGTHS FROM 8″ TO 49″ (3 TO 44 LB RANGE) – The Series 300 fits nearly all non-tilt window sizes, from light residential sashes to heavy commercial frames. Covers a complete range of lengths and weight ratings for versatile use. Each balance is precision-tested for smooth, reliable performance and long-term durability. Sold individually; accessories and hardware not included. Contact WRS if your exact size isn’t listed.
- SMOOTH, SAFE & SECURE OPERATION – The Series 300’s precision pulley and spring system balances the sash to prevent slamming or sticking, keeping windows steady at any height. Designed for quiet, reliable performance in homes, schools, and offices where safety and ease of use matter every day.
- HEAVY-DUTY GALVANIZED STEEL CONSTRUCTION – Crafted from high-strength galvanized steel for long-term durability and corrosion resistance. Precision pulleys and springs maintain smooth lift through thousands of cycles, ensuring reliable performance for years of daily use. Built tough for pros yet simple enough for DIY installation.
- TRUSTED SINCE 1989 – WRS Window Repair Systems has over 30 years of experience supplying reliable, high-quality hardware. Trusted nationwide by homeowners, contractors, schools, and property managers for dependable repairs and long-lasting performance.
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Specifications
Size
36-2 (13-18 lbs)
Material
Material
Brand
WRS
Has written warranty
No
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
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