Andersen 431 Narroline Sash Balance Unit Number_AR4 This unit takes the place

This unit takes the place of a screen measuring 23-7/8" wide by 34-27-32" high

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

This operator fits windows with a visible glass dimension width of 12-5/8"

Andersen 2046 Conversion Kit for Narroline Windows - White Exterior / White InteriorThis kit fits an Andersen Narroline window with a visible glass size (lower sash) of 20 7/16 inches wide by 23 15/16 inches high

Andersen 431 Narroline Sash Balance Unit Number_AR4 This unit takes the placeAndersen Perma Shield Narroline sash balancer 431. 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.