8LB WD Sash Balance, Prime-Line, Mfr#: H 3579

Wood window sash balance for a 8 lb window, or 16 lbs if one is used on both sides This sash balance style has been used by a variety of manufacturers of windows for a variety of decades It fits a 314 in by 638 in pocket that has been mortised about 2 in above the centerline of the window frame It features an all steel construction, with a coil spring inside that retracts aircraft cable lifters as it offsets the weight of the window vent If your windows sashes, are having problems staying up when opened, it may be that your sash balances or hardware needs to be replaced The sash balances hold the weight of the window pane, over time, the springs can wear out or fail Replace your sash balance for a smoother operation of your window and allow fresh air to enter your home with a window that stays open