Window channel balance

Question

Looking for part identifier for the window channel balance. Details:
1. Width: About 9/16"
2. Depth: 5/8"
3. Length: 28"
4. Marking: 2730 BSI JL

Bob · Accepted Answer

Thanks for posting. See the S351-28 or S390-28 Channel Balance. The only difference between these two balances is the depth of the bottom nylon shoe. See below. For a stamp option, see 2730.

Comparison of the S351 and S390 balance shoes.