Savannah Series 20 single hung window with colonial grids. 3-1/8 In. frame depth, total welded frame and sash construction, continuous head. Features energy efficient 5/8 In. Low E3 glass, reinforced interlock system for air tight fit, and fully pocketed sill for tight seal. Brick mold gives traditional look to home exterior, balance covers give finished look to the interior. J-channel reduces trimming, lock and keeper provides added security, integral pre-punched nail fin for new construction. Block and tackle balance system for easy operation and maintenance. Tilt in bottom sash. Designed for new construction. Rough opening and call out sizes are the same. Includes 1/2 screen.