Business Source Kraft Gummed Catalog Envelopes - Catalog - 10" Width x 15" Length - 28 lb - Gummed - Kraft - 250 / Box - Brown Kraft - Heavy-duty, all-purpose mailing envelope is ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. 28 lb. opaque kraft construction delivers privacy of contents. Open-ended style allows easy insertion and removal of items. Moisture-activated gummed flap ensures a secure seal.