Quality Park Park #9 Redi-Seal Double Window Envelopes, White, Box of 500 (24529)
#9 Double window envelopes.  Compatible with most standard 8.5 x 11 inch computer-generated invoices and statements.  The top window is positioned 3/8" from left and 2" from the bottom of the envelope.  The bottom window is 3/8" from the left and 1/2" from the bottom.  Poly windows and inside tint for privacy of contents.