no tip color, need advice

A quick learner from new jersey says:
existing spiral balance is 3/8" x 28-1/2" (measured correctly) for tilt window. window is 20lbs. I was figuring on ordering the S900-29, but what tip color? Can you list all avaiable and their weight classifications? Is there a downside to overcompensating for weight?
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Donna from SWISCO responded:
29" tube length Series 900 with
Red tip will carry a window sash weight range of 10 through and including 22 pounds
Green tip will carry 14 through and including 26 pounds

This information is based on 2 balances per sash. Balances are designed assuming friction in the jamb weather-strip will carry a portion of the sash weight. Suggested sash weights are approximate.
A quick learner from New Jersey says:
Thanks!! I really appreciate getting
all info prior to ordering, so I get
it correct the first time. Fantatstic
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