Tilt Window Balancer

A home owner from Michigan says:
I have what look like galvanized window balancers without any identifying numbers or markings. No colored tips to identify weight either. They are 3/8" x 35" and the vinyl window weighs 20.12 lbs. Your help would be greatly appreciated in identifying the correct replacement window balancers.
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Tom from SWISCO responded:

Looks like you need tilt window spiral balances. Based on your dimensions and sash weight, you want the S900-35 with a Green Tip color option.

How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
VIDEO
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How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
VIDEO
WATCH >
How To Choose the Proper Spiral Balance Tip Color
How To Choose the Proper Spiral Balance Tip Color
GUIDE
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How to adjust a spiral balance on a tilt window
How to adjust a spiral balance on a tilt window
GUIDE
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