Please help identify correct window channel balance

Question

I have a 22-inch length (of the metal itself) window channel balance that looks close to Series 351, but for two problems (1) Although the length measures exactly 22 inches, the metal stamp says 2220, which matches only the 23 inch one and (2) the shoe is a different size -- substantially smaller. I've attached photos. Thanks! (You were really great in identifying the correct custom parts for my first order last month!)

Casey · Accepted Answer

Hello,

Your shoe is substantially smaller because it appears to be broken. You'll need to measure an undamaged shoe to determine if you need the S351 or S390 channel balance.

As for length, if you're 100% sure that the metal channel is 22" long, then you will have to weigh your sash on a scale and refer to the chart shown under the balance product description to choose the corresponding strength option. Thank you!