Removable sealing strip provides clean, quick seal of No. 10 business envelopes without the use of moisture. Simply peel back the strip and fold the flap closed. Pressure-sensitive gum forms a permanent bond. The paper strip keeps the adhesive free of dust, ensuring a long shelf life. White wove envelopes are security tinted. 24 lb. Quality Park Redi-Strip Business Envelope - Security - #10 (4.13in. x 9.50in.) - 24 lb - Self-sealing - Wove - 30 / Box - White is one of many Business Envelopes available through Office Depot. Made by Quality Park.