These easy to seal tamper-resistant self seal mailers. Once these self seal mailers are sealed, any tampering is very evident. Yet, this self seal mailer can be easily opened by simply pulling the tear tab on either side of the self seal flap. All sizes of our self seal mailers except for the 4-1/2 x 5 and the 12-3/4 x 15 inch self seal mailer open on the widest side for easier product insertion. The 4-1/2 x 5, 5-1/4 x 5-1/4, and the 6-3/8 x 6 inch self seal mailers, are made from .020 clay coated news back. All other sizes are made of .028 clay coated news back.
