Pratt PRA0145 100% Recycled Corrugated Cardboard Box, 30" Length x 5" Width x 24" Height, Kraft 100 percent recycled corrugated box for packing, shipping, and storing 32 ECT grade for standard stacking performance Side-loading flat rectangular shape fits art, mirrors, or other flat items Made of single wall C flute corrugated fiberboard with standard kraft color Full overlapping flaps add stacking strength and provide extra protection for outer edges on two sides