Window Balance 2863 BSI OD

Question

Stamped 2863. 1/2" channel balance. Can't tell if it is an S351 or an S390. I'm pretty confident on the 19-002 top, but don't see much difference between the 15-001 & 15-002 bottom.

Also, can I assume that going up to a 2865 is the right choice?

User submitted photos of a window balance.

Tom · Accepted Answer

The difference between the 15-001 and 15-002 is in their size. You will need to carefully measure yours and refer to the dimensions we show to confirm the better match.

I'm not sure about the stamp. "2863" is very peculiar. I recommend weighing your sash rather than guessing.