Window channel balance

Hi Diane. This looks like either our S351-35 or S390-35. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. In either case for a new stamp option choose 3430. 

I think you're exactly right. These shoes do often wear from age. In any event, we can logically assume that if the depth is any greater than 1", it can't be the Series 351; therefore, go with the Series 390. 

Yes, all of our balances come fully assembled and are ready to install out of the box.