Channel Balance Help

A home owner from San Jose, CA says:
September 23, 2020

One has DB 102 2640. Another one has DB 103 2640. Metal length is 27

I need two pairs of above two parts for two windows.

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Bob from SWISCO responded:
September 28, 2020

Both balances appear to be either an S351-27 or S390-27, depending on the depth of the bottom nylon shoe. Compare both with your old hardware to see what matches best. You will need a stamp option of 2640
A home owner from San Jose, CA says:
September 28, 2020
Hi Bob,

Please see attached files regarding to S351-27 and S370-27. Is the depth of the bottom nylon shoe as the my cycle in red color? One is 1". Another one is 1.125". Is that what you are talking about? If I buy the wrong part, will 1/8" cause any issue? If it is not, I can order either one? Or I can order 1"(351-27) to be safe. Please let me know which one is better?

Thanks,

TJ
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Bob from SWISCO responded:
September 28, 2020

Hey TJ. Yes, that's the depth you circled there. The S351-27 has a shoe depth of 1". For the S390-27, it's 1-1/8". See the picture below. That depth does indeed make a difference. If it proves to be over 1" though, you can assume you have the Series 390. Let me know if you have further questions.

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
A home owner from San Jose, CA says:
September 28, 2020
Rob,

Thanks. I measure the existing one. It is about 1-1/8". So I will order S390-27.

Thanks,

TJ
27" Series 351 Channel Balance
27" Series 351 Channel Balance
S351-27
$10.77
27" Series 390 Channel Balance
27" Series 390 Channel Balance
S390-27
$10.55
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