Tyvek Self Seal Flat Envelopes, 12"W x 15-1/2"L, White, 100/Pack

THESE TYVEK® ENVELOPES PROVIDE SUPERIOR PUNCTURE, TEAR AND MOISTURE PROTECTION. FEATURES UL STYLE"MARGIN-TOP0PX;PADDING-TOP 5PX PADDING-BOTTOM 5PX;" CONSTRUCTED FROM 14 LBS OLEFIN TEN TIMES STRONGER THAN PAPER ENVELOPES FEATURES SELF-SEAL CLOSURE AVAILABLE IN PLAIN AND FIRST CLASS PRINTED BORDERS