Yellow tip for S600-28?

A quick learner from WI says:
My balances have a yellow tip, what is the compatible color?
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Tom from SWISCO responded:
I'm not sure. You may have an old weight rating system, which isn't so compatible with modern balances. That doesn't mean that one of ours won't work, it just means that they're rated differently. I recommend weighing your sash on a scale and looking at the chart we have on the S600-28 store page.
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