Business Source Durable Kraft Catalog Envelopes - Document - #10 1/2 - 9" Width x 12" Length - 24 lb - Gummed - Kraft - 250 / Box - Kraft - Durable, all-purpose mailing envelope is ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. 24 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.