Quality Park, #11 Kraft Envelopes, Gummed, Brown Kraft, 4.5x10.375, 500 per box (11362) GUMMED FLAP: Provides users with ease of mind that their contents will stay securely closed DURABLE: Heavyweight 28-lb. paper stock ensures no rips or tears MULTI-PURPOSE: Use these Brown Kraft envelopes as office envelopes, interoffice envelopes, storage of documents, etc. FEATURES: 500, 4.5x10.375 Kraft Envelopes GREAT VALUE: Every box comes with 500 gummed envelopes that are so versatile they can be used for multiple purposes.