Sash cam size?

A home owner from Broomfield CO says:
Need to replace broken sash cam but don't know the size. My window channel balance size is 31 9BSI DC and the other is 25 9BSI DO. Not sure they help determining the sash cam size.

Thanks.
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Tom from SWISCO responded:

This part looks like a top sash guide. In particular, it's similar to our 18-008. Look over the dimensions we show on its store page and let me know if they match up.

A home owner from Broomfield CO says:
seems to match up. Thanks Tom!
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