1/2" Wide Channel Balances

A handy person from 94952 says:
February 26, 2018
Hello, my channel balance doesn't have a matching number. The # I have is 2340, can you help?

I need two of each, now I can't decide if I need series 351 or 390,the length of the channel shoe is 1.093, measured with a caliper, so is it 1" or 1.125?

The channel is stamped with the number 2340 and the original window series is 1500/1570 DH-R20.
hope to find the right one.

thanks
User submitted photos of a window balance.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
March 2, 2018
If your shoe is over 1", it is likely our Series 390 balance. I would wager it was once 1-1/8" but wore down over time.
A handy person from 94952 says:
March 4, 2018
Thanks
24" Series 390 Channel Balance
24" Series 390 Channel Balance
S390-24
$10.55
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