One replacement 6 spline clutch hub for PTO slip clutches, replaces 160 mm diameter clutch hubs that use two friction disc, will not fit 4 friction disc units. These are new take off OEM clutch hubs. Designed to mount via one conical pin not included. Replacement Conical pins can be found in our online store. Specifcations: OD: 160mm or 6.29" ID: 35mm (1-3/8") with 6 splines Fits Eurocardan FD2 Series Clutches