Casey from SWISCO responded:
March 16, 2021
Hello, It looks like you have either our S351-28, with a 15-002 bottom attachment, or S390-28, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2720 spring strength option for your replacement balances. As for the top sash guide, it's hard to tell what you might need without seeing it uninstalled with detailed dimensions. That being said, you can start by comparing the specification of our 18-009 and 18-018 to yours. Thank you! Comparison of the S351 and S390 balance shoes.
|