Spiral Balance color

A quick learner from Millis MA says:
I need to replace some broken spiral balances. They are 5/8 in diameter, but have a yellow tip. The windows are large (sash is 33" tall, 48" wide, and they are heavy. I haven't removed one yet to see how heavy, but they are definitely heavy.

Is there a level of yellow that is beyond black?
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Tom from SWISCO responded:
Black Tip balances have the strongest spring strength of all our Series 600 balances. If you don't know what tip color you need, I highly recommend weighing your sash on a scale to know exactly what to pick.
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