- Works with Narroline®; double-hung windows manufactured from 1968 to 2012.
- Works with 1856 cottage and 2056 cottage units with non-tempered glass.
- Balancer maintains the position of the window sash.
- They are found above the upper sash in the head jamb, and are located on each side of the window.
- This balancer is Works with the Left hand side of the window as viewed from the exterior of the window.
When replacing balancers we recommend replacing both balancers and the window side jamb liners, the Right hand balancer for this window is R9/627
