Need channel balance replacements

A handy person from California says:
June 14, 2020
My channel balances are marked as shown in photo. However, the metal-only length measures 28". The overall length, including the top guide & shoe is 29".
It seems my channel balances match your Series 351 in every way. But is the Series 351 metal-only length 30", or 28" like mine?
Please advise so that I can order & begin to replace my broken ones.
Thank you!
Randy
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Casey from SWISCO responded:
June 17, 2020

Hello,

We carry the S351 in various lengths, including the S351-28 with a 28" metal channel. Take a look and make sure that both end attachments match up to the S351. 

You will also need to weigh your window sash and follow the chart under the product description to choose your spring strength option. Thank you!
28" Series 351 Channel Balance
28" Series 351 Channel Balance
S351-28
$10.97
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