3010 Number on Balance Sash Wt. 7-12 lbs Part Number 60-301

3010 Stamped on non-tilt window balance. 31" Channel Balance Length. Sash Weight: 7-12 lbs. 1/2" x 1/2" non-tilt window channel balance. Part Number 60-301
***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.