What option do I need for a 24 B stamp?

Question

The channel balance I want to replace has the code 24 B stamped on it.  It looks like the S370 and is 25".  I am not sure which stamp option to choose or the sash weigh range.  Can you tell from the " 24 B" stamp?

Paul · Accepted Answer

An option of 24 B  commonly corresponds to our 2420 option. Two balances with the 2420 option can carry a sash weight of 9 through 15 pounds. I recommend weighing your sash to confirm that this will work for you.