Window hardware replacement request

A contractor from Maryland says:
January 11, 2023
Bottom glass of the window:

Spring tub length 37in.
Tube diameter 1/2 in.
Pivo shoe length 2in.
Pivot shoe wide 1-1/4 in.
See picture.
Part

Upper glass of the window:
Spring tub length 35in shorter then the lower glass
Others measurements are the same as the bottom one
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Profile picture of Casey
Casey from SWISCO responded:
January 12, 2023

Hello,

It looks like you could have either the 5/8" diameter S600 or 3/8" diameter S900 spiral balances. You will need to confirm which measurement matches an intact balance tube since these types of balances were not made in 1/2". 

We would also need you to write out the exact thickness of your pivot shoe to narrow down your options. Thank you! 
37" Series 600 Spiral Tilt Window Balance
37" Series 600 Spiral Tilt Window Balance
S600-37
$10.47
35" Series 600 Spiral Tilt Window Balance
35" Series 600 Spiral Tilt Window Balance
S600-35
$10.32
37" Series 900 Spiral Balance
37" Series 900 Spiral Balance
S900-37
$13.41
35" Series 900 Spiral Balance
35" Series 900 Spiral Balance
S900-35
$9.82
Pivot Shoe, 1/2" Thick
Pivot Shoe, 1/2" Thick
15-046
$2.15
Pivot Shoe, 5/8" Thick
Pivot Shoe, 5/8" Thick
15-047
$2.20
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