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NBK Japan MJC-40K-WH 1/2" to 9/16"inch Jaw-type Flexible Coupling Shaft Diameter - 50mm NBK Japan MJC-65-EGR 5/8 inchNBK Japan MJC 40K WH 1 2 inch to 9 16 inch Jaw type Flexible Coupling NBK Japan MJC 40K WH 1 2 inch to 9 16 inch Jaw type Flexible Coupling NBK Japan MJC 40K WH 1 2 inch 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: 1 2 inch Coupling Bore 2 Diameter: 9 16 inch Coupling Length: 66 Coupling Outer Diameter: 40 Material: Stainless