8-4 stamped on window balance. Length of Metal Channel: 9 inches. Sash Weight: 10 - 13 lbs. 1/2" Non-Tilt Window Channel Balance Spring.
61 series channel balance with hemmed edge.
Note: Top and bottom balance end brackets must be selected. See diagram for reference. End brackets will be attached to balances.
***Special order, allow 3 to 4 weeks to ship. Minimum order 6.