brand new and excessive qualityOOTDTY Features:3.17/4/5/6/8mm Motor Shaft Coupler Sleeve Coupling Chuck Adapter.Flexibility of coupling shaft gets rid of strain between the motor and riding components.It can for play a task within the unexpected.Great helper in your productivity.Specifications:Material: SteelColor: Black/SilverMatch Inner Hole: 6mm (M6)Match The Motor shaft Diameter: 3.17mm,4mm,5mm,6mm,8mm.(Pls desire type)Quantity: 1 SetNote:Please enable 0-3mm error thanks to manual measurement. pls make sure you do not intellect earlier than you bid.Due to the adaptation between different monitors, the image may not mirror the particular color of the item. Thank you!Package Contents:1 Set of Motor Shaft Coupling (without retail package)