Quality Park Heavyweight Catalog Envelopes, Gummed, Brown Kraft, 10 x 13, 250 per Box, (41665) MULTI-PURPOSE: These 10 x 13 envelopes are perfect for storing and mailing full size 8-1/2 x 11 sheets of paper, letters, documents, catalogs, photo's and other home and business mailings DURABLE: Made from heavyweight 28 lb. paper stock GUMMED: Fully gummed flaps provide a secure seal to keep contents secured GREAT VALUE: Conveniently packed in 250 count to reduce frequency of purchasing FEATURES: 250 Brown Kraft, 10 x 13 Catalog Envelopes