... both sides,Absorption of parallel, angular misalignmentsIBEST manufactures high quality flexible coupling, which function in in dynamic application synchronously.1.Features Of ... part: polyurethane 4 pieces. * M: The hole dia. Of the encoder end. N: The hole dia. Of the user end. * D ... indicate)L: the long of coupling.30mm (special please indicate)M: The hole dia. of the encoder end.Φ4,Φ5,Φ6,Φ8 ...