Part 351 or 390 difference
Home Owner from Milton Florida
Apr 28, 2020 10:05 am
Need to replace all my window guts...I know they are 1/2 channel..but not sure how to determine the bottom shoe measurement
1 user uploaded image
4 Replies
Casey from SWISCO
May 1, 2020 8:39 am
Hello, I can't tell without seeing the top attachment if you have the S351 or S390 balance but if you're sure that those are a visual match to your original, take a look at the diagram below to measure the depth of the bottom attachment. The S390 has a 1-1/8" depth, while the S351 measures 1" exactly. Thank you!
Comparison of the S351 and S390 balance shoes.
Home Owner from Milton Florida
May 1, 2020 10:12 am
I'm pretty sure I need the S390...send a pic of the top as well....thank you for tour help!
4 user uploaded images
Casey from SWISCO
May 1, 2020 10:28 am
Unfortunately, we can't get accurate dimensions from photos but if the bottom attachment measures 1-1/8" as shown in our diagram, I agree that the S390 would be the way to go. Now you'll just need to measure the length of the metal channel and choose a spring strength option based on the stamp on your original balance.
