28 13 Non-Tilt Window Balance. 29" Channel Balance Length. Weight Range: 41-43 lbs. Double spring window balance with 61-502 and 61AP-502 end brackets attached. Length of Metal Channel: 29". Number Stamped on Balance: 28 13. 61AP series Caldwell window balance.
***Special order, non-returnable. Allow 4 to 6 weeks to ship.