Heavy duty construction provides greater protection and stacking strength. Cartons are sold in bundle quantities and ship flat to save on storage space and shipping. 9"H 9"W 13"L. 275# D. W. /ECT-48 (Edge Crush Test) -meets standard requirements for shipping. Holds up to 100 lbs. Heavy-duty, double wall corrugated boxes provide maximum protection to ensure that your shipments arrive safe. Sizes are inside dimensions (usable space) L W H(D). Shipped flat and bundled for compact storage. Assembles in seconds, just fold and tape. 100% recyclable. Double Wall Boxes are manufactured from heavy duty 275#DW/ECT 48corrugated. Dimensions: 09"x9"x13". Capacity (Cu. Ft. ): 0. 60. Manufactured from heavy duty 275#DW/ECT 48corrugated. 25/Bundle. Twice the protection of a standard carton.