Premium Appletree House Brand. Empi, Porsche, Off-Road 930 C.V. Joint. 108mm (Aprox. 4 1/4") Outside diameter, .875" balls. 28 Spline Inner Race Solid Outer Race, w/ Chromoly Cage. The Fit Between The Balls And Tracks Is Very Loose To Allow For Maximum AnglesAppletree Automotive