channel for non-tilt Kenro window

Question

it looks like S380 or S385.  It is 30" long from tip of metal to the other end of the tip of metal. The only markings on it:  29  3    B.S.I.  pf

Tom · Accepted Answer

For a "29 3" marking, we expect a 30" balance and 2930 stamp option. Keep that information in the back of your mind for when you go to make a purchase. As for the difference between S380 and S385, here's how you determine it: measure the shoe, which is the bottom attachment. If you measure it as shown below, and your shoe measures 1-3/32", as in the photo, you need the S385. If the shoe measures only 1", go with an S380. Take a look:

Comparison of the S378, S380 and S385 balance shoes.