Correct Replacement Channel Balance

A home owner from California says:

I seem to have the correct size channel balance selected, but I require your assistance in selecting the correct spring. The numbers stamped on the channel balance are 26-3 FD5 CMC 87.

Your assistance is greatly appreciated.

Best regards,
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Tom from SWISCO responded:
Hey, Ken. A stamp of "26-3" usually means you should choose our 2630, but you can always weigh your sash to be sure. Did you see the chart on the S380-26 store page? All you have to do is weigh your sash and refer to this chart.
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