looking for window channel balances 19-d-40 size

A quick learner from japan says:
June 23, 2016
to whom it may concern,
we are looking for window channel balances 19-d-40 size ...we just want to know what size of window channel balances we can use , we need suggestion please....
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Tom from SWISCO responded:
June 23, 2016
I see you were looking at our S765-20. Is this what you have? If so, 19-d-40 is not a stamp that usually goes with this. If you are not sure what option to choose, you will need to weigh your sash on a scale and refer to the S765-20 store page.

If the S765-20 is not what you have, or if you aren't sure, we will need pictures of your balance to confirm a better match.
20" Series 765 Balance
20" Series 765 Balance
S765-20
$12.97
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