This rear drive axle shaft measures 35-11/32 in. overall with a 2.190 in. shaft diameter, sized for Mack applications specifying that fitment. It rotates within the axle housing to carry torque from the differential out to the rear wheel hubs. The shaft is sold individually.Interchanges:2513369968KH3232P3BSH-5526FeaturesRear drive axle shaftOverall length 35-11/32 in.Shaft diameter 2.190 in.Sold individually (EACH)Sold by Pro Gear and TransmissionTech SpecsLength: 35-11/32 in.Diameter: 2.190 in.Unit of Measure: EACH