Business Source 16473 Business Envelopes, No. 10, Peel/Seal, 9-3/4'' x 4'', 500/BX, White, BSN16473, BSN 16473, No. 10 envelopes with a window require no moisture to seal. Simply peel back strip and fold closed. Protective strip keeps adhesive free from dust. 1-1/8" x 4-1/2" window is positioned 7/8" from left and 1/2" from bottom. No. 10 envelopes are security-tinted for privacy of contents and made of 24 lb. white wove stock. UPC Code 035255164733, Quantity 500/BX