Tall double wall cardboard corrugated boxes 6″ x 6″ x 36″ 275#/ect-48 – 15 pack twice the protection of a standard carton. manufactured from heavy-duty 275# dw/ect-48 kraft corrugated heavy-duty construction provides greater protection and stacking strength cartons are sold in bundle quantities of 15 and ship flat to save on storage space and shipping for help selecting the right box, click the brochure tab below.