Replenish the office supply with a bulk dispenser. Keeping a large quantity in stock makes it easy for every employee to access the envelopes as needed. They're designed and structured as a basic clasp envelope, useful for schools, administrative records and business mailing, with a smooth, windowless surface for customized messages. The flaps feature both metal clasps and gum adhesive for much-needed peace of mind. Seam Type: Center; Flap Type: Cheese Blade; Trade Size: #90; Security Tinted: No.