Coil Balance weight

A handy person from Pennsylvania says:
November 15, 2015
Hello;

How do you tell what weight a coil balance supports? I need to replace the all 6 coil balances in one of my single-hung windows (3x on each side); and I can't find the weight on the old coil balances.

Thanks,
Mike
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Tom from SWISCO responded:
November 16, 2015
There should be a number printed on the coil spring itself, near the screw hole. You will need to remove the balances from the window in order to check.

If there are no stamps on the springs, then please take a few pictures of your springs and of the pivot shoes to which they attach. Please also tell me the weight of your sash. With this information, we can make a recommendation.
Pivot Shoe, 17/32" Thick
Pivot Shoe, 17/32" Thick
15-199
$3.70
4 lb Series 165 Egress Coil Balance
4 lb Series 165 Egress Coil Balance
S165-4
$4.70
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