Quality Park Large Format/Catalog Envelopes, Redi-Seal, Brown Kraft, 10 x 13, 250 per Box, (QUA43762) DURABLE: Made from heavyweight 28 lb. paper stock REDI-SEAL: No moisture required with this Redi-SEAL closure MULTI-PURPOSE: These 10 X 13 envelopes are perfect for storing and mailing documents, catalogs, photo's and other home and business mailings IDEAL: These catalog envelopes are a great option for mailing, storage, and organizing GREAT VALUE: Conveniently packed in 250 count to reduce the frequency of repurchasing