Northeastern Envelope Co. #10 Double Window Envelope 4.125 x 9.5 24 lb White Wove Quick Stick Seal Box of 500

#10 Double Window Envelope 500-Count Box

This #10 double-window envelope measures 4.125 by 9.5 inches and uses 24 lb white wove paper. The Quick Stick seal closes without moisture for fast processing. Each box contains 500 envelopes suited for high-volume business mailings. The dual windows display both sender and recipient addresses from inserted documents.

Window Positions Limit Form Layouts

The top window measures 13/16 by 3-3/4 inches and sits 5/8 inch from the left edge and 2-13/16 inches from the bottom. The bottom window measures 1 by 4 inches and sits 5/8 inch from the left edge and 5/8 inch from the bottom. These fixed cut-outs require documents to align address blocks precisely to both openings. Misaligned prints will obscure information or show internal content.

Quick Stick Seal Determines Closure Speed

The pressure-sensitive adhesive activates on contact without moistening. This eliminates the need for water reservoirs or sponge applicators in mailing equipment. The seal is permanent once pressed and cannot be reopened without tearing the flap. Operations that require resealable envelopes or traditional gummed flaps must choose a different product.