I need two balances

A contractor from Richmond California says:
November 7, 2018
I do not know the brand name from which these balancers come from. I would assume one could tell from the model number. It does not appear these come in right and left varieties , however, if they do, I need one right and one left.

Also, I wonder if you have a distributor in the San Francisco Bay area where I can pick these up. Please let me know. Thank you.
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Tom from SWISCO responded:
November 15, 2018

I recommend our S350-30 channel balance. This comes with a 19-001 top and 15-004 bottom, so as long as those match up you should be okay. 

Your spring strength option of 29-9 is outdated. This means you'll need to weigh your sash on a scale and refer to the chart on the S350-30 store page to find the best match.
30" Series 350 Channel Balance
30" Series 350 Channel Balance
S350-30
$11.52
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