Quality Park Double Sided Inter-Department Envelopes - Interoffice - 10" Width x 13" Length - 28 lb - Self-sealing - Kraft - 100 / Box - Kraft - Strengthen in-house communication with Quality Park 2-Sided WR Redi-Tac Inter-Department Printed Envelopes. Unlike traditional envelopes, these are designed for repeated use and come preprinted with labeling columns to help employees stay productive and organized. Thanks to the reusable Redi-Tac adhesive, trading materials will be straightforward for everyone involved.