Brand new and high quality.Type: Shaft Coupler ConnectorMaterial: CopperColor: YellowInner Diameter: 8mm to 10mmSize: 22X16mm Description:Connection Diameter: 8mm to 10mm, Total Length: 22mm /0.87 inch, Outside Diameter : 16mm/ 0.63 inch.Wide Applications: Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly at the shaft, and are utilized in motor and gearbox assemblies.With Screws: Top tight kind rigid coupling with 2/4 screws to carry the shaft tightly; high torque with rigidity, low inertia and perfect sensitivity.Note: The rigid form essentially doesn't enable eccentricity, and it needs to be completely adjusted throughout use.Design: Single piece set screw clamp design makes it clean to establish the goods on the shaft and control the conserving skill of the coupling.Package Included: 2Pcs Shaft Coupler ConnectorNote:Due to the sunshine and display screen environment difference, the item's coloration could also be barely various from the pictures.Please enable slight dimension distinction because of diversified guide measurement.