1/2" Wide Channel Balances

Question

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.

Tom · Accepted Answer

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.