Quality Park #9 Double Window Envelopes show the sender address and receiver address for billing invoices, business checks and other important statements. The ultimate in privacy and security, these Reveal-N-Seal security envelopes have a perforated tamper evident seal, plus a reflex blue pattern to protect sensitive information, even when envelopes are held up to light. Each self sealing envelope is made of 24 lb white wove paper with side seams for a professional appearance. Business envelopes seal closed by simply lifting the bottom flap up and pressing it to the top flap for a permanent seal. Available in boxes of 500 so you never run out! Envelope dimensions are 3 7/8 x 8 7/8 inches. Top window dimensions are 1 3/16 x 3 1/2 inches, 3/8 inches from the left and 2 inches from the bottom. Bottom window dimensions are 1 x 4 inches, 3/8 inch from the left and a 1/2 inch from the bottom.
