Searching for 17 3 ET CMC 2

See our S380-18 or S385-18 Channel Balances. 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 determine what you need. In either case for a new stamp option choose 1730. 

Comparison of the S380 and S385 balance shoes.