Replacement OEM Series 8 ME Style Constant Velocity Joint, complete ready to install. 1-3/8" X 6 Spline with Metal Collar Quick Disconnect and Metric Series 8 Triangular Yoke on the other end. Fits 63mm Tubing ("A" Dimension in PTO Tube Drawing) Heavy Duty Series 8 fits most larger mower applications, rated 150hp @1000 rpm and 95hp@540 rpm.