Specifications include, but are not limited to: Oversized #10 Window Envelopes with Inside Security Tint (2-sided) . Equivalent items may be bid; however, all equivalent item bids MUST include documentation to prove equivalency. The final decision on equivalency will be determined by the requesting Department. . Oversized #10 Window Envelopes with Inside Security Tint (2-sided) . Quantity: 250M . Size: 9 ¾” x 4 ¼” . Window dimensions: 4 ¼” x 1 1/8” . Window Location: 1” from left edge, ½” from bottom edge. . To be printed two sides, (Ink Side 1: 647 blue / Ink Side 2: 647 blue & 363 green) on 24 lb. white wove recycled stock with clear poly window and gummed flap. . Envelope must have inside security tint (black). . Envelopes must have the Maine Tax Portal logo centered below the flap on the back of the envelope. . Seam is diagonal . Copy supplied as PDF file (see attached). . To be packaged in boxes of 500, 2500 per case.