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NBK Japan MJC-55CS-WH 12mm to 9/16"inch Jaw-type Flexible Coupling roller cage NBK Japan MJC-80-RD 1 1/8NBK Japan MJC 55CS WH 12mm to 9 16 inch Jaw type Flexible Coupling NBK Japan MJC 55CS WH 12mm to 9 16 inch Jaw type Flexible Coupling NBK Japan MJC 55CS WH 12mm to 9 16 inch Jaw type Flexible Coupling, this is a Jaw type flexible coupling. The bellows allows eccentricity, angularmisalignment, and end play. Coupling Bore 1 Diameter: 12mm Coupling Bore 2 Diameter: 9 16 inch Coupling Length: 78 Coupling Outer Diameter: 55 Material: Stainless This is a