Can I replace double coil baalnce with a single coil balance

A quick learner from Reno says:
September 28, 2016
I currently have a double coil spring balance on each side of my windows that are 1/2 inch wide. Can I replace them with a single coil balance on each side? The windows being held up are 45 W X 28 H. If so, would you send me ALL of the new parts #'s and prices so I may order them from you.
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Paul from SWISCO responded:
September 30, 2016
I see you purchased our S160-5. Is this the spring you're looking to change? If so, please tell me the weight of your sash and we can see if something else can work.
Pivot Shoe, 1/2" Thick
Pivot Shoe, 1/2" Thick
15-111
$2.44
5.5 lbs Series 160 Coil Balance
5.5 lbs Series 160 Coil Balance
S160-05
$4.63
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