20 x 20 x 20" ECT-71 Heavy-Duty Double Wall Boxes

These 20 x 20 x 20 inch corrugated boxes are built to ECT-71 double wall specifications, combining two fluted layers bonded between three kraft liners for significantly greater compression strength and puncture resistance than standard single wall cartons. The ECT-71 rating makes these among the most robust stock corrugated boxes available in a cubic format.

The equal-sided cube footprint suits dense, heavy, or irregularly shaped contents that benefit from uniform interior clearance on all axes. Typical applications include industrial components, automotive parts, bottled goods, bulk hardware, and manufactured parts shipped through distribution centers, contract warehouses, and heavy e-commerce fulfillment operations.

Double wall board weighs approximately 4.64 lbs per box, a factor worth noting when calculating pallet weights for outbound freight planning. Boxes are sold in bundles of 10 and ship via parcel carrier.