Staples #10 Window Security Envelopes with Gummed Flaps - 4-1/8" x 9-1/2" - White - 500 Pack

Send secure mail that presents a professional look with Staples #10 Window Security Envelopes. Ideal for business correspondence, #10 is a commonly used envelope size for mailing letters, cheques, billing statements, invoices and more. These white envelopes feature a smart, pointed flap with diagonal seam and a gummed closure that is moisture-activated for a secure seal. Crafted for quality, they are made of sturdy 24 lb stock and come with convenient left-sided address windows. For greater priv