SERIES 385 CHANNEL BALANCE

A handy person from Colorado says:
August 17, 2017
The replacement channel balance I need looks most like your SERIES 385. The metal channel is 17". But the stamp on mine say 1690. Should I just order the heaviest option 1660? Or do you have an option for 1690?
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Tom from SWISCO responded:
August 22, 2017
Thank you for reaching out to us. The best way to select the correct spring strength option is to weigh your window sash and use our sash weight range chart. If your sash is heavier than our greatest stock option can accommodate, we can make a custom balance for you. Just let us know your sash weight and how many balances you will need.
17" Series 385 Channel Balance
17" Series 385 Channel Balance
S385-17
$9.34
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