WESTERN STATES #10 All Purpose Poly Window Envelope 24# White Side Seams Black Wesco Inside Tint Box of 500

#10 Window Envelope for Business Mail

These #10 poly window envelopes suit offices that send invoices, statements or direct-mail pieces in volume. The white sulphite stock carries an SFI certification and a 92% brightness level for a clean, professional appearance. A black Wesco inside tint blocks sensitive content from view through the window. Each box contains 500 envelopes for high-volume mailing runs.

Simple Machine Insertion and Sealing

Side-seam construction feeds reliably through most folder-inserters and postage meters without jamming. The poly window film resists static buildup that can cause sheets to stick together during high-speed runs. Moisture-activated gum on the flap seals securely with standard desk moistener or machine sealer. No special equipment or adjustments are required beyond normal #10 settings.

Verify Window Position and Paper Compatibility

Confirm that your letterhead or form places the recipient address within the standard #10 window area before ordering. The 24# sulphite weight works with typical laser and inkjet printers, but test a sample sheet if you use heavy toner coverage or coated stock. Ensure your folding method produces a finished fold size that matches the envelope dimensions. Buyers needing a different window size, security pattern or peel-and-seal closure should look elsewhere.