RetailSource B100804WM10 Corrugated Mailers, 10" x 8" x 4" (Pack of 10) Corrugated mailers are manufactured from 200#/ect-32-b corrugated Crush resistant mailer folds to provide double walls of protection on front and sides Unique wave-rule edge virtually eliminates paper cuts These one piece mailers fold together in seconds. No tape, Glue or staples needed 10 boxes