20 inch length
Not sure what the weight is but "19 3 DR Caldwell" is stamped on the side.

Hey, thanks for posting. This balance appears similar to our S385-20, though I can't say for sure. How does it compare? Is the bottom shoe the same as yours? Check out the dimensions below.
I would also recommend our 1930 option, though you should weigh your sash just to make sure that's correct.