Can you tell which Channel Balance I Need?

Thanks for posting. See either our S351-25 or S390-25. The only difference between these two balances is the 'depth' of the bottom nylon shoe. The Series 351 bottom nylon shoe has a depth of 1", whereas the Series 390 bottom nylon shoe has a depth of 1-1/8". Compare with your old balances and see what you think matches best.

Once you pick a balance, you'll need to choose a stamp option of 2440, for a window sash in the weight range of 19 through 24 lbs.