This heavy-duty CRL Tubular Spiral Balance for Non-Tilt Windows will replace a 9/16" diameter (14 mm) metal or plastic tube balance with a sash load capacity of up to 35 pounds (15.9 kg). While this balance is packaged and sold individually, it is our recommendation that both balances in the window be replaced at the same time. 1. To select the proper tubular spiral balance, check diameter of the metal or plastic tube on the old balance: 9/16" is Series "FJ"; 3/8" is Series "FM" or "FR", depending on the fitting at the end of the rod.
How to Order Tubular Spiral Window Balances:
2. Measure tube length only; do not include rod length.
3. Check color of nylon bushing. If white or red, select a standard duty balance; if blue, select a heavy-duty balance.
4. Verify if fitting on rod protruding from the nylon bushing matches an illustration for non-tilt type balances. Select the appropriate series ("FM" or "FR") if balance diameter is 3/8".
5. Order quantity required of each new balance by the CRL catalog number.