Columbian #8-5/8 Security Envelopes, 500 Pack, Double Window Self Seal Envelopes for QuickBooks Checks and Business Mailings, 3-5/8" x 8-5/8", Durable 24 lb White Paper

Columbian #8-5/8 Double Window Envelopes are built for businesses that rely on accurate, professional check mailing every day. These white security envelopes are sized specifically for QuickBooks and other generated checks, allowing only addresses to appear in the windows. The top window measures 13/16 x 3-1/2 inches; 5/8 inches from the left and 2-1/4 inches from the bottom. The bottom window measures 1 x 4 inches, 5/8 inches from the left and 5/8 inches from the bottom.\n\nTo help protect sensitive financial information, each envelope features a blue security tint with a printed privacy pattern. This internal design limits visibility through the paper, reducing the risk of confidential data being read during handling, sorting, or delivery. It’s a simple but effective safeguard when you're sending checks, vendor payments, or account documents. \n\nThe durable 24 lb white wove paper and side seams provide durability during mailing while maintaining a high-quality finish for both small offices and high-volume mailrooms. Mailing efficiency is improved with self seal business envelopes. A unique Redi-Seal closure has two adhesive flaps that you simply press together to seal—no moisture or peel strip trash.\n\nWith 500 envelopes per box, this bulk pack supports consistent mailing needs without frequent restocking. Columbian Security Envelopes offer a smart solution for businesses that value privacy, efficiency, and a polished presentation in every mailing. (Manufacturer Item Number: COLO182)

• PROTECT SENSITIVE FINANCIAL DETAILS: A blue security tint with safety pattern blocks visibility, helping safeguard confidential information from prying eyes, even when held up to light
• MAIL CHECKS WITH CONFIDENCE: Designed for QuickBooks and computer-generated checks, these double window envelopes align perfectly so addresses show cleanly while amounts and data stay private
• FAST, MESS-FREE SELF SEAL ENVELOPES: Redi-Seal envelopes feature press-to-seal adhesive flaps that create a secure closure without peel-strip trash, licking envelopes, or the need for wet sponges
• PRESENT A PROFESSIONAL IMAGE: Thick 24 lb white wove paper with side seams creates a crisp, high-quality look that reflects well on your business and holds up in transit
• STOCK-UP VALUE PACK: 500 business envelopes per box keep offices and home businesses ready to mail; #8-5/8 envelopes are 3-5/8 x 8-5/8 inches and fit laser and inkjet checks without folding