Literature Mailer Literature Mailer Type Standard Wall Type Single Wall Inside Length 18 in Inside Width 12 in Inside Height 3 in Inside LxWxH 18x12x3 in Board Test 32 ECT Outside Length 18 3/4 in Outside Width 12 1/2 in Outside Height 3 1/4 in Outside LxWxH 18-3/4x12-1/2x3-1/4 in Wall Thickness 5/32 in Fluting Profile B Flute Maximum Load Capacity 65 lb Material Corrugate Color White Post-Consumer Recyclability 100 Percent Standards ASTM-D-5118