Sash counterbalance part id

A handy person says:
August 26, 2015
A counterbalance in one of our vinyl, tilt out windows broke recently. The dimensions of the balance are 2.5" tall, 3/4" wide and 1/5" deep. The spring, which broke, on the counterbalance has either a 6z or z9 ID on it. Do you have any idea if I may buy a replacement part. Thank you so much for your help.
User submitted photos of a coil window balance.
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Paul from SWISCO responded:
August 27, 2015
Thanks for posting. The housing looks like our 15-087. Do you agree? If so, I'd also recommend our Series 180 coil spring.
A quick learner says:
August 27, 2015
Thank you for the reply. Can you tell me how to choose the coil weight?
Tessa Barsic
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Tom from SWISCO responded:
August 27, 2015
Sure, you simply have to match up the number printed on your coil with the options we have listed for this Series.
Coil Housing Pivot
Coil Housing Pivot
15-087
$5.97
6 lbs Series 180 Coil Balance
6 lbs Series 180 Coil Balance
S180-06
$4.45
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