Front roller assembly.

Barrel = 2.3" OD x 22-3/4,
Shaft .67" OD x 24-1/2" long, no holes on the pulley side, shaft extends .45" out from pulley, non-pulley side has a threaded hole with 8-1.25 threads.
Pulley = 4.3" OD x 1.1" wide with 10 ribs, with one magnet on the out side.