Specification: Tips: If you wish vast quantity, we will provide wholesales for you. Thanks Descriptions: 1.Product name: universal joint coupling 2.Material: iron plating (no. forty five steel) 3. The coupling is great for connect your motor of 2mm and 10mm shaft. 4. Provides torque transmision and alignment. 5. Cost advantageous coupling design. 6. Stainless steel is good in corrosive environments. 7.Scope of use: motor, instantly shaft, compatible for mannequin car, mannequin boat, robot, Etc category metallic move use! Package Include: 1PCS*Universal Joint (Note: Screws are not included here. )