Jaw Coupling Hub; 8.3" Hub Dia; Jaw Coupling; Hub; Shaft; Spline; No Keyway; 11.4" Outside Diameter; 3.63" Length Thru Bore; 900 Size or Series; Set Screw; Magnesium Alloy; 1800 Maximum Speed; Neoprene 47842.3 | Urethane 71763.5In-Lbs Torque