which block and tackle balance

A quick learner says:
January 16, 2024
Hello,

I need replacement block & tackle window balances. Mine are labelled
" 30 5 JQ CALDWELL" on the back.
Thumbnail of the uploaded file named front of bottom
Thumbnail of the uploaded file named side bottom fitting
Thumbnail of the uploaded file named side wingless fitting
Thumbnail of the uploaded file named wingless top fitting
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Emily from SWISCO responded:
January 17, 2024

Hey there!

Thank you for reaching out to us. It appears you have either the S351-31 or S390-31 channel balance with the 3050 stamp option. You will have to measure the bottom shoe as shown below to determine which Series is best for your repair. 

If you have any questions just let me know!

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
31" Series 351 Channel Balance
31" Series 351 Channel Balance
S351-31
$11.52
31" Series 390 Channel Balance
31" Series 390 Channel Balance
S390-31
$11.30
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