Specification Brand : MEIHAOCNC BulletPoint1 : Material: Aluminum alloy, polyurethane. Type: Plum shaped BulletPoint2 : The shaft couplers are mainly used for CNC machines,servo motors, spindle, step motor etc BulletPoint3 : Flexibility of coupling shaft removes stress between the motor and driving components BulletPoint4 : Super torque can absorb vibration, appropriate a large torque transmission. BulletPoint5 : High hardness,Durable,and excellent response,not easy to loosen Color : Onecolor Department : unisex-adult ItemDisplayWeight : 0.05 kilograms ItemName : Motor Coupler RB25-30 Out Diameter D25 Length 30 Inner Hole 5-10mm RB Hold-on Coupling Connector for Ball Screw Lead Screw MEIHAOCNC (5 x 7) ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : MEIHAOCNC Material : Metal ModelNumber : RB D25L30 NumberOfItems : 1 PartNumber : RB2530-5 x 7 ProductDescription : Origin : China Material : Aluminium Model Number : RB D25 L30 Certification : CE Flexible or Rigid : Flexible max torque : 2.4Nm max speed : 6000RPM out diameter : 25mm length : 30mm inner hole : 5-10mm