Pratt PRA0001 Recycled Corrugated Cardboard Single Wall Standard Cube Box with C Flute, 4" Length x 4" Width x 4" Height, (Pack of 25) 100 percent recycled corrugated box for packing, shipping, and storing 32 ECT grade for standard stacking performance Cube shape fits various items Made of single wall C flute corrugated fiberboard with standard kraft color Shipped flat to reduce shipping costs and storage space