Double Wall Shipping Boxes 20x20x20 — 10/Bundle

A 20x20x20 double wall corrugated box rated at 275# (double wall ECT) can typically support contents weighing up to 65–80 lbs depending on the specific ECT rating and stacking conditions. Always verify load requirements against the box's burst and edge crush test ratings before shipping heavy goods.

These double wall 20x20x20 shipping boxes are sold in bundles of 10. This bundle size is suited for businesses with moderate shipping volumes, offering a balance of convenience and cost efficiency without committing to full pallet quantities.

Yes. Double wall corrugated boxes rated to ECT and Mullen burst strength standards meet carrier packaging requirements for UPS, FedEx, and freight carriers. Always confirm your specific box's burst strength or ECT rating meets carrier guidelines for the item weight being shipped.

Absolutely. The 20x20x20 double wall construction provides excellent stacking strength for warehouse storage as well as protection during transport. The robust 275# construction handles repeated stacking without collapsing, making these boxes effective for both short-term shipping and longer-term storage applications.

Clear carton sealing tape or white paper tape applied in an H-tape pattern on both the top and bottom flaps is recommended. For heavier contents, use 2-inch wide reinforced tape to ensure flap integrity throughout transit, especially when boxes are handled by freight carriers or palletized.

Yes. Cardboard Boxes 4 U offers custom printed corrugated boxes including the 20x20x20 size. Custom printing allows branded messaging, handling instructions, and logos to be applied to your boxes. Contact the sales team at (888) 333-9513 or Sales@cardboardboxes4u.com for custom print pricing and minimum order details.