Literature Mailer Literature Mailer Type Standard Wall Type Single Wall Inside Length 12 in Inside Width 11 3/4 in Inside Height 3 1/4 in Inside LxWxH 12x11-3/4x3-1/4 in Board Test 32 ECT Outside Length 12 3/4 in Outside Width 12 1/4 in Outside Height 3 1/2 in Outside LxWxH 12-3/4x12-1/4x3-1/2 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