Pella double hung window coil balance part identification and purchase

Hello there. I believe this shoe might be an older version of our 15-228 , but look over the dimensions cited below and let me know if they match. If so, this shoe uses either our Series 160 1/2" thick springs, or our Series 165 3/8" thick springs. Compare both with your old springs to see which you need. See the video below which demonstrates how to remove and replace a similar type of coil balance assembly.

Dimensions for 15-228

Great, I'm glad that the shoe matches. As for the coil, you want to measure the width of the band. If your stamp reads 5.5, then that means it's rated for 5.5 pounds. Odds are that means you have the 1/2" Series 160. Measuing it will verify.