AC Rollers Itoh Denki AC Rollers are our original motorized conveyor rollers and will be discontinued soon. PM380AS 1.5″ diameter motorized conveyor roller PM427AS 1.68″ diameter motorized conveyor roller PM486BS 1.91″ diameter motorized conveyor roller PM570AS 2.25″ diameter motorized conveyor roller PM570AU 2.25″ diameter motorized conveyor roller PM570BP 2.25″ diameter motorized conveyor roller PM605AS 2.38″ diameter motorized conveyor roller PM605AU 2.38″ diameter motorized conveyor roller PM605BP 2.38″ diameter motorized conveyor roller PM763BS 3.0″ diameter motorized conveyor roller