Andersen L1427/31 Narroline Sash Balance Unit Number_2056E This screen measures 16-13/16" wide

This screen measures 16-13/16" wide by 24-5/16" high

This screen measures 21-5/16" wide by 60-7/8" high

choose "Pre-1980" from the color selector

This sash has an unobstructed glass size of 15 inches wide by 13 15/16 inches high

Andersen TW34410 (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 L1427/31 Narroline Sash Balance Unit Number_2056E This screen measures 16-13/16" wideAndersen Perma Shield Narroline sash balancer L1427 31. Sash balancers are metal boxes that contain a nylon cord under tension. The balancer number is a code for the tension and the cord length. The proper balancer must be used to maintain either the lower sash or the upper sash in an open position. If you replace one balancer you should replace both balancers.