... -10mm 30*42--6.35-10mm Oldham Coupling, Outer Diameter 30mm, Length 42mm, bore 6.35-10mm SpecificationsBF ... polyurethane 4 pieces. * M: The hole dia. Of the encoder end. N: The hole dia. Of the user end. ... please indicate)M: The hole dia. of the encoder end.Φ4,Φ5,Φ6,Φ8,Φ10,Φ12,Φ15mmN: the ... .5M3BF101030426.5M3BF121230426.5M3BF151530426.5M3 Oldham Coupling, Outer Diameter 30mm, Length 42mm, bore 6.35-10mm