2420 Number on Balance 9-15 lbs Sash Wt. 60-242

2420 Number on Window Balance. 25" Balance Length. 9-15 lbs Sash Weight. 1/2" x 1/2" Non-tilt window balance.
***Note: Top and bottom balance ends must be ordered separately. We strongly suggest replacing the sash guides on the side of your window as well.