Hub bearing sleeve for Norton frames, rear wheel swingarms, used from 1955 for all pre cush drive rear hubs, full width hub. Axle sleeve. Maj diam:15/16inch (24mm); Min Diam: 17mm; Inside Diam: 9/16inch (14mm); Overall Length: 4-34 inches (121.5mm) Original part number: K12-1/434;18321; 067701 - rear hub inner sleeve