... : polyurethane 4 pieces. * M: The hole dia. Of the encoder end. N: The hole dia. Of the user end. * ... )M: The hole dia. of the encoder end.Φ4,Φ5,Φ6,Φ8,Φ10,Φ12,Φ15mmN: the hole dia.of the user ... end.Φ4,Φ5,Φ6,Φ6.35,Φ7,Φ8,Φ10,Φ12,Φ15mmTorque≤5.0NmThe axial degree≤0.2mmThe corner setover≤ ... contact us!IBEST ELECTRICAL CO.LTD Flexible Coupling BF series ,Coupling ,Aluminium alloy Encoder coupling (IBEST)