Channel balance

Question

Channel itself is 29" long

Numbers stamped on channel #1 is 2830 BSI AR
Numbers stamped on channel #2 is 2830 BSI AT

I have one channel on the left side of the window frame and the other on the right

I wish to purchase both sides.

Bob · Accepted Answer

This appears to be either an S380-29 or S385-29. 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. For a new stamp option choose 2830.

Comparison of the S380 and S385 balance shoes.