Schaefer Drum Bearing for 3100 series furlers.   Will fit Schaefer 3100 series jib furlers from 1997 - Present.   Drum is completely assembled and includes two flushing holes for easy maintenance.   Drum diameter is 4-3/8" (111mm).    If you have any questions please reach out to us at 508/995-9511 or Sales@SchaeferMarine.com