Caldwell window balance slides

A home owner from indianapolis says:
balance slides sizes
Channel Balance
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Paul from SWISCO responded:
Depending on your bottom balance shoe depth (for 1", use S380-25, or for 1-3/32", use S385-25) you will need one of our Series 380 or Series 385 side-load balances. The spring weight "option" would be 2440, based on your 24 4 stamp. Measure as shown below to choose a Series:
Comparison of 15-004 & 15-005
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