Z2 Expansion Sleeve Coupling Tension Sleeve Keyless Bushing Clamping Coupler Locking Disk Connection Taper Bush 42MM-65MM 1PC Features: High centering accuracy, steady and dependable connection Long service life and simple installation/adjustment/disassembly Relying on friction transmission, No keyway weakening of the connected parts Widely utilized in heavy machinery, CNC mechanical device tools, automation package and other fields If you can not find the dimensions you need, please depart a message and call me!