Feature: 1. Super can absorb vibration, and can transmit larger appropriately. 2. High‑quality aluminum alloy material, has high hardness, durability and long service life. 3. Wide applicability, mainly used in CNC machine tools, servo motors, spindles, stepping motors, etc. 4. Small, light in weight, easy to operate and use, no complicated steps are needed, saving time and effort. 5. Sophisticated production, excellent quality, superior performance, and high work efficiency will bring you more convenience. Specification: Condition: Brand New Item Type: Shaft Coupler Material: Aluminium Alloy Color: As the Picture Shown Length: Approx. 25mm/1in Inner Diameter: Approx.5mm/0.2in Diameter: Approx. 8mm/0.3in Package List: 5 x Shaft Coupler