Spiral Window Balance, what color?

A quick learner from Pueblo Co says:
I have a window needing the spiral balance's to be replaced. I pulled the old balances and don't see a color tip on the rod anywhere.
The diameter of the old spiral balance is 3/8", 28" long.
The window that lifts in the track measure's approximately 21"x30"
The spiral balance has the numbers "109" "B" on it. The window is a betterbilt window, placed in the house approximately 1998.
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Tom from SWISCO responded:
Sure, I'd be happy to help. Can you first tell me what the weight of your sash is? Can you also tell me if its tilt or non-tilt? Thanks!
A quick learner from Steve says:

Thanks in advance!
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Tom from SWISCO responded:
Thank you. Now, based on this information, I would ordinarily recommend our S900-28 spiral balance with a Red Tip option. However, you mentioned that your balance had numbers stamped on it. Series 900 balances don't often have those. Could you maybe take a couple pictures of the balance? I'm wondering if yours is specially made for some reason.
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