Block and Tackle balances

A contractor from Tewksbury MA says:
I am looking for 36 of the part in the attached photo. The numbers on it say 3190A. The metal to metal length is 32". Please let me know if this is something you can get.
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Casey from SWISCO responded:

Hello,

It looks like you have either our S351-32, with a 15-002 bottom attachment, or S390-32, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need to weigh the sash and follow the chart under the product description to choose the correct spring strength option for your replacement balances. Thank you!



1
S351-32 : 32
32" Series 351 Channel Balance
S351-32
$11.08
VIEW >
S390-32 : 32
32" Series 390 Channel Balance
S390-32
$11.08
VIEW >
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