Comparison : Item # UGCJO307-23, Eccentric Collar Locking Four-Bolt Flange Unit, UGCJO300 Series
Item # UGCJO308-24, Eccentric Collar Locking Four-Bolt Flange Unit, UGCJO300 Series
Item # UGCJO309-27, Eccentric Collar Locking Four-Bolt Flange Unit, UGCJO300 Series
Item # UGCJO310-31, Eccentric Collar Locking Four-Bolt Flange Unit, UGCJO300 Series
Item # UGCJO311-35, Eccentric Collar Locking Four-Bolt Flange Unit, UGCJO300 Series