Shipping Box Wall Type Single Wall Inside Length 18 in Inside Width 18 in Inside Height 16 in 18x18x16 in Inside LxWxH 32 ECT RSC Outside Length 18 5/16 in Outside Width 18 5/16 in Outside Height 16 5/8 in 18 5/16x18 5/16x16 5/8 in Outside LxWxH Wall Thickness 3/16 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