8 1/2 x 14 1/2 - #3 Reinforced Mailer 500/Case 14 x 14 box The back of the mailer

The back of the mailer is white opaque for printing the address and postage

W5c and V3c corrugated meets military specifications

Double fold corners and double glued flap increase the envelopes strength and edge protection

Boxes are printed with up arrows and write on deliver to destination panel

Sold and shipped flat in bundle quantities

8 1/2 x 14 1/2 - #3 Reinforced Mailer 500/Case 14 x 14 box The back of the mailerThese envelopes are constructed from laminated fiberglass strands between kraft paper layers which adds extra tensile strength and superior protection against grease, water, and oil damage. The laminated fiberglass reinforcements protect the bags against tearing, puncturing, and abrasion. Being unpadded, these reinforced bags cost less to mail. Secure enclosure for mailing items that don't require cushioning.