Andersen 20310 Upper Sash with White Exterior and Natural Pine Interior with Low-E4 Glass Color:Pine Interior / White Exterior This screen measures 31-7/8" wide

This screen measures 31-7/8" wide by 38-27/32" high

This sash has a visible glass size of 40 7/16 inches wide by 35 15/16 inches high

This screen measures 25-5/32" wide by 45-3/8" high

Andersen TW1836 (Lower Sash) White Exterior and Natural Pine Interior High Performance LowE4 Finelight Glass (1992 to May 2010) Works with 400 Series Tilt-Wash Double-Hung Windows manufactured from 1992 to May 24

Andersen TW38310 (Lower Sash) White Exterior and Natural Pine Interior High Performance LowE4 Glass (1992 to May 2010) Works with 400 Series Tilt-Wash Double-Hung Windows manufactured from 1992 to May 24

Andersen 20310 Upper Sash with White Exterior and Natural Pine Interior with Low-E4 Glass Color:Pine Interior / White Exterior This screen measures 31-7/8" wideAndersen 20310 Narroline Double Hung Upper Sash White Exterior with Natural Interior Works with Andersen Narroline Double Hung 1968 to 2012. This sash has a White Exterior with Natural Interior. This window sash has Low E Glass. Low E4 Glass is a high performing glass that improves energy efficiency over standard dual pane glass. It also adds fade protection and water spot reductions due to it's special coating. This sash features a patented Flexacron