WESTERN STATES #10 DG-1NT Double Poly Window Envelopes 4.125 x 9.5 24# White 500 Box

#10 Double Poly Window Envelopes

These #10 envelopes measure 4.125 by 9.5 inches and come in a box of 500. They are built for high-volume mailing operations that require two separate window views on a single envelope. The white sulphite stock carries SFI certification and a 92 brightness rating. A vellum finish gives the surface a professional feel.

Sustained mailing performance

The 24 pound paper weight resists tearing during automatic insertion and long transport runs. Diagonal seam construction adds strength at the edges where stress concentrates. Remoistening seals activate reliably after storage. Double poly windows stay clear through humidity changes and machine handling. The flap-down design feeds cleanly through folder inserters.

Upgrade from single-window stock

This double-window format replaces separate mailings when both a return address and a recipient address must show through the envelope. It eliminates the need to print addressing information on the letter itself. The jump is worth it when statement runs, invoices or cheques require two distinct window positions. Standard single-window envelopes cannot accommodate this layout.