Proper Spiral balance

A quick learner from Rochester Hills, Michigan says:
Looking to replace a couple spiral balances. Would like help identifying the right strength of balance model (tip color). My balances do not have any markings on them. I believe my balances my still be okay but I would like to purchase new. My windows were installed without stops, so I believe we have been over traveling the window and have popped the balance off the glides bottoming out the blances.

Balance stats:
Body length 33"
Window weight 40 lbs.
Width on body is at 1/2", would 5/8" be correct assumption.

Picture attached.
A user submited photo of window spiral balance
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting! It sounds like you may have something like our Series 600 spiral balance. With your length, it would be S600-33. However, I don't believe we have any tips that would support your sash weight. We may have to custom make a balance.

To begin, please take a look at this Custom Spiral Balance Order Form that I have started for you and fill out the rest of the information. One of our representatives will be in contact with you shortly thereafter.
A quick learner from Rochester HIlls says:
Thanks. I will complete and try and get this done.
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