Channel balances

A handy person from Edgartown, MA says:
Hello, I need to replace the two channel balances pictured. The cord is frayed on one, and broken and reattached but too short on the other one. These are 1/2" wide and metal 15" long. I'm not sure which part number they are, but I did replace one plastic top end part no. 18-110 in a recent order.
User submitted image of their window hardware.
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Paul from SWISCO responded:
It's tough to say for sure what you have, but start by looking at our S390-15 channel balance. This comes with the 19-002 top and 15-001 bottom. Carefully compare these to your existing balance system to confirm everything matches up.
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