Shipping Box Box Style Cube Wall Type Single Wall Inside Length 18 in Inside Width 18 in Inside Height 18 in 18x18x18 in Inside LxWxH 32 ECT RSC Outside Length 18 3/8 in Outside Width 18 3/8 in Outside Height 18 5/8 in 18 3/8x18 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 17 in to 19 in Length Shipping Boxes