Business Source Business Envelopes, No. 10, Peel/Seal, 9-3/4" x 4", White (BSN16473) Pack of 500No. 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 to protect the privacy of your contents and made of 24 lb. white wove stock. General Information Manufacturer: Business Source Manufacturer Part Number: 16473 Brand Name: Business