Quality Park 10 x 13 Catalog Mailing Envelopes with Redi-Seal Closure - Catalog - #13 1/2 - 10" Width x 13" Length - 28 lb - Self-sealing - Kraft - 100 / Box - White

First-class Catalog Envelopes require no moisture to seal. Simply fold down the flap, press and mail. With Redi-Seal envelopes, you have no peel-off strip to throw away. The special coating on the 28 lb. envelopes provides a secure and permanent seal.