Quality Park QUA21418 Security Window Envelope 500ct

Product Description

The QUALITY PARK QUA21418 is a No. 10 security window envelope designed for high-volume mailing operations where privacy and reliable sealing are priorities. Built from 24 lb white wove paper, it uses a double-flap self-sealing design that requires no moisture to close, eliminating the need for sponges or adhesive strips at the mail station. An inside tint blocks contents from view without requiring a separate security liner. The window measures 1.125 inches by 4.5 inches, positioned 0.875 inches from the left edge and 0.5 inches from the bottom, sized to align with standard address blocks on folded documents. Each box contains 500 envelopes.

This envelope is suited for office, billing, and accounts payable environments that send invoices, statements, checks, or correspondence in volume. The self-sealing closure is designed to resist premature adhesion during storage, making it practical for bulk pre-stuffing workflows. The No. 10 format is the standard business envelope size, compatible with typical tri-fold 8.5-by-11-inch documents. This product is sold by the box and is appropriate for both large organizations and small businesses with consistent outbound mailing needs.

Key Features

• Double-flap self-sealing closure requires no moisture or separate adhesive
• Inside tint provides privacy without a full security liner
• Window size 1.125 inches by 4.5 inches aligns with standard address placement
• Window positioned 0.875 inches from left and 0.5 inches from bottom
• 24 lb white wove paper construction
• 500 envelopes per box

Compatibility

Designed for use as a standard No. 10 business envelope compatible with typical tri-fold letter-size documents and common laser and inkjet address printing workflows.

Installation Notes

Store boxes flat in a cool, dry environment to prevent the self-sealing adhesive from activating prematurely. When stuffing, ensure the document address block aligns with the window opening before sealing. Once the double flap is pressed closed, the seal is permanent and the envelope should not be forced open. Handle in moderate humidity conditions to maintain seal integrity.