Reveal-n-Seal® 24lb. envelopes, 3-5/8”x8-5/8”, with double windows feature a unique adhesive that provides strong, moisture-free secure seal and an extended shelf life. You'll have no removable strip to throw away. Inside security tint and perforations along flap reveal any tampering. Envelopes are compatible with most standard cheques for payroll and accounts payable applications.