Business Source Durable Open-End Catalog Envelopes - Catalog - #1 3/4 - 6 1/2" Width x 9 1/2" Length - 24 lb - Gummed - Wove - 500 / Box - White - Durable, all-purpose mailing envelope is ideal for mailing documents, catalogs, direct mail, promotional material, brochures and more. 24 lb. opaque white wove construction delivers privacy of contents. Open-ended style allows easy insertion and removal of items. Moisture-activated gummed flap ensures a secure seal.