No. 8-5/8 Double Window Security Tinted Check Envelopes feature a self-seal closure for the ultimate quality, convenience & privacy your checks deserve. Side seam construction adds a modern, professional touch. Convenient, Redi-Seal closure requires no moisture or a pull-off strip to throw away. Just unfold the bottom flap & press for a secure seal. Premium security tint preserves privacy during mailing. 24 lb. bright-white stock gives mailings a clean, crisp look. Double-window design displays sender & receiver addresses.