Coil balance Stamped 10




Thanks for reaching out to us. When you said the old balance had the number 10 stamped on it, do you mean the 10 was stamped on just the housing itself or was it printed on each individual spring?
If the 10 was just on the housing then you should be fine using our S140-10. Each assembly is rated to hold 10 pounds, same as your original. It doesn't matter if it has one spring, two springs, or more, 10 pounds is 10 pounds.
One way you can check to be 100% sure that this is right is to weigh your sash on a scale. Two S140-10 balance assemblies are meant to hold a total of 19 to 20.99 pounds altogether, so if your sash weight falls in that range then you should be good to go.