Shipping Box Box Style Tall Wall Type Single Wall Inside Length 4 in Inside Width 4 in Inside Height 18 in 4x4x18 in Inside LxWxH 32 ECT RSC Outside Length 4 3/8 in Outside Width 4 3/8 in Outside Height 18 5/8 in 4 3/8x4 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 3 in to 8 in Length Shipping Boxes