21 12 Non-Tilt Window Balance. 23" Channel Balance Length. Weight Range: 31-34 lbs. Double spring window balance with 61-500 and 61AP-501 end brackets attached. Length of Metal Channel: 22". Number Stamped on Balance: 21 12. 61AP series Caldwell window balance.
Special order, non-returnable. Allow 3 to 4 weeks to ship.