Bob from SWISCO responded:
June 23, 2023
Hi there. I believe you have an older version of our Series 140 Coil Balance system. You'll need to choose a specific spring weight. Look for a stamp on the coil balance housing this shoe connects to. If there is none, or you are uncertain, obtain the exact weight of the window sash. Give us that exact weight and we can work it out for you. |
Bob from SWISCO responded:
July 17, 2023
Great! A pair of S140-8 coil balance assemblies is designed to hold a total sash weight of 15 through 16.99 pounds. that would be my top recommendation. Note that these balances are sold individually, not in pairs. Please feel free to reach out if you had any other questions! |