351 balance

A contractor from Milwaukee, WI says:
I am looking for a 22" balance, stamped 2190.
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Tom from SWISCO responded:

Thanks for posting! I'm not sure what your question is. If you were wondering about the stamp, the answer is that some older manufacturers used "90" as a mark for sash weight. However this rating system has fallen out of use for more modern systems. One of the standard stamp options for our S351-22 may very well work for you, but you'll have to weigh your sash and refer to the chart we show on that store page to confirm the best match.

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