100% Brand new , never used Item"s color might be different from the picture because of the aberration. Specification: Shaft: 6.35mm x 10mm. Length: 30mm. Diameter: 25mm. Material: Aluminium. This high quality shaft coupler is widely used to connect servo motor, stepper motor, encoder, screw driving, machine platform, etc. Size: 3cm x 2.5cm x 2.5cm /1.18inch x 0.98inch x 0.98inch. Weight: 33g Package Included: 1 x Motor Shaft Coupler Coupling