Sash window balance

A handy person from California says:
September 21, 2019
I need a pair of window balance for my pull-up Window. The stamp on the old balance indicates 19 4 DU CMC 4. The length is 20 inch. Please suggest which one to use.

Thanks
Joe
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Paul from SWISCO responded:
September 30, 2019

Hi there. Although we can not see a good photo of either your top pr bottom nylon fitting, I am sure we can still help you with this. Take a look at the selection of balances we offer here. See if any of our balances can be used as alternatives to yours. Whichever one chosen will go with a 1940 option. 
20" Series 385 Channel Balance
20" Series 385 Channel Balance
S385-20
$9.38
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