Business Source Clasp Envelopes, 28 lb., 12" x 15-1/2", Brown Kraft (BSN36667) Pack of 100Heavy duty clasp envelopes feature an open end style, reinforced clasps, and deep gumming on flaps for a secure seal. Metal clasp with rounded edges is plated for rust resistance. Large flap and superior gumming secure documents inside. 28 lb. General Information Manufacturer: Business Source Manufacturer Part Number: 36667 Brand Name: Business Source Product Name: Heavy duty Clasp Envelopes Marketing Information: Heavy duty clasp envelopes feature an