Shipping Box Wall Type Single Wall Inside Length 12 in Inside Width 12 in Inside Height 18 in 12x12x18 in Inside LxWxH 32 ECT RSC Outside Length 12 3/8 in Outside Width 12 3/8 in Outside Height 18 5/8 in 12 3/8x12 3/8x18 5/8 in Outside LxWxH Wall Thickness 1/8 in Fluting Profile C Flute Maximum Load Capacity 65 lb Material Corrugate Color Kraft Post-Consumer Recyclability 100 Percent Standards ASTM D5118 Inside Length Range 12 in to 13 in Length Shipping Boxes