Coil Balancers

A quick learner from Swedesboro, New Jersey says:
February 25, 2020
Large window has 2 coils. TC 340 on top and TC 74C on bottom.
Small window has 1 coil TC 74C
What # to order.
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A quick learner from Swedesboro, New Jersey says:
February 25, 2020

Weights of the sashes are 23 lb. and 13 lb.

The Top on the large is 540 not 340.

Bottom 740

Am I looking at 5 and 7 lb. springs ?

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Casey from SWISCO responded:
February 26, 2020

For the smaller window weighing 13 pounds, see our S170-7 coil spring. For the larger window weighing 23 pounds, see both our S150-8 and S150-4 coil springs. Look them over and let me know if you have any other questions. 
7 lb Series 150 Coil Balance
7 lb Series 150 Coil Balance
S150-7
$6.59
8 lb Series 150 Coil Balance
8 lb Series 150 Coil Balance
S150-8
$6.72
4 lb Series 150 Coil Balance
4 lb Series 150 Coil Balance
S150-4
$6.45
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How to Replace a Triple Coil Balance System
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