... action. * Absorption of large angular misalignments by spring action setscrew type. * Material: Aluminum ally. * D: External diameter of the connector; L ... hole dia.of the user end.Φ4,Φ5,Φ6,Φ6.35,Φ7,Φ8,Φ10,Φ12,Φ15mmTorqueType Flexible Coupling, Encoder Coupling , DR series Coupling ( IBEST ...