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NBK Japan MJC-80CS-BL 1-1/4" to 1-3/4" Jaw-type Flexible Coupling 6900 Fits Easton / Velomax AscentNBK Japan MJC 80CS BL 1 1 4"inch to 1 3 4 inch Jaw type Flexible Coupling NBK Japan MJC 80CS BL 1 1 4"inch to 1 3 4 inch Jaw type Flexible Coupling NBK Japan MJC 80CS BL 1 1 4"inch to 1 3 4 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 1 4"inch Coupling Bore 2 Diameter: 1 3 4 inch Coupling Length: 114 Coupling Outer Diameter: 80