26x26x26 Double Wall Shipping and Packing Box – Heavy-Duty Corrugated Cardboard (Single Box) Engineered for Strength, Built to Protect 1 Box per Order When size and strength matter most, our 26x26x26 Double Wall Shipping Boxes deliver maximum durability for large, heavy, or high-value shipments. Constructed from 48 ECT double-wall corrugated kraft cardboard, these extra-strong boxes provide superior protection against crushing, punctures, and impact—making them perfect for industrial, commercial, or residential shipping needs. Whether you’re shipping machinery parts, bulk goods, or fragile oversized items, this box is built to handle it all. Key Features 💪 Heavy-Duty Double Wall Construction – Two layers of corrugated cardboard offer exceptional rigidity and crush resistance. 📏 Large 26" Cube Design – Ideal for packing bulky or oddly shaped items. 🌎 Eco-Friendly Kraft Material – Made from sustainably sourced, 100% recyclable materials. 🚚 48 ECT Certified Strength – Meets and exceeds industry standards for heavy-duty shipping performance. 🇺🇸 Made in the USA – Proudly manufactured domestically for consistent quality and faster delivery. 🧱 Thick 1/3" Board – Provides structural integrity for stacking, storage, and long-distance transport. Product Specifications Specification Details Internal Dimensions 26" x 26" x 26" (L x W x H) Material Double Wall Kraft Corrugated Cardboard Board Strength 48 ECT / 1/3" Thick Weight per Box 6.7 lbs Quantity per Order 1 Box Color Natural Kraft Brown Recyclable Yes – 100% Recyclable & Eco-Friendly Country of Origin Made in the USA Ships Flat Yes – Saves Space & Freight Costs Perfect For Heavy or fragile items Industrial and mechanical parts Electronics, appliances, and tools Moving, warehousing, and storage applications Long-distance or multi-modal shipping (air, water, rail, and ground) Why Choose Double Wall Boxes? Double-wall corrugated boxes feature two layers of fluting for unmatched strength and durability. This design resists crushing, moisture, and vibration damage, ensuring your shipment arrives safely—even under the most demanding conditions.