The PRO Series New Construction window from United Window & Door features a durable black finish with Onyx black acrylic coextrusion technology. This innovative finish is guaranteed to never peel, warp, blister, or flake. Its low-e and Argon gas filled double pane glass ensures increased efficiency, while the fully welded frame and sashes allow for smooth and easy operation. The exterior is coated with Onyx black acrylic coextrusion, while the interior is made of white vinyl. The Teflon coated, stainless steel constant force balance system is corrosion resistant and provides effortless operation. The weather-tight, true sloped sill repels water and prevents leaks, and the Nite locks add an extra layer of security by limiting window opening to only 2 inches. A full screen, made of a dark fiberglass mesh, allows for ventilation and maximizes visibility while keeping insects out.