Quality Park #8 5/8 Double-Window Security Envelopes, Self-Sealing, Tamper Evident, For Checks, Payroll, 24 lb White Wove, 3-5/8 x 8-5/8 Inches, 500/Box (QUA67539)
Reveal-n-Seal Envelopes 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 tint and perforations along flap reveal any tampering. No. 8-5/8 envelopes are compatible with most standard checks for payroll and accounts payable applications. 24 lb.

Quality Park #9 Security Envelopes, Double Window, Self Seal, Invoices/QuickBooks Statements, 3-7/8 x 8-7/8 Inches, 24 lb White, 500/Box (QUA24529)
Quality Park #9 Double Window Envelopes show the sender address and receiver address for billing invoices, business checks and other important statements. A special Redi-Seal closure doesn't require any moisture to seal. Simply press the bottom flap to the top flap and close. These security envelopes have a reflex blue pattern to protect sensitive information, even when envelopes are held up to light. These business envelopes are made of 24 lb white wove paper with side seams for a professional appearance. 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.