Specification Brand : MOOKEENONE BulletPoint : 32474 1 SHAFT COLLAR SS BulletPoint1 : Good quality super strong CNC flexible shaft couplings are suitable for high torque bush-less motor such as 4092 5684, 5694. BulletPoint2 : The shaft hole is designed with negative tolerance, The shaft hole is 0.02mm smaller than the remark diameter for tighter installation, If you find it difficult to install, please heat it to 200-300℃ before installing. BulletPoint3 : Size: 5mm to 4.76mm BulletPoint4 : Fits 4.76mm (3/16") flexible shaft BulletPoint5 : Package include: 1 Set Flexible Shaft Coupling Color : Silver CompatibleGrooveDiameter : 8.01 millimeters ExteriorFinish : Aluminum ExternallyAssignedProductIdentifier1 : 0738287324747 ExternallyAssignedProductIdentifier2 : 738287324747 FinishType : Silver IncludedComponents : 1 ItemName : 5mm to 4.76mm Steel Shaft Coupling Joint Connector Rigid Coupler for RC Boat ItemPackageDimensions_Height : 1.6 centimeters ItemPackageDimensions_Length : 4.2 centimeters ItemPackageDimensions_Width : 1.6 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : set-screw-couplings Manufacturer : MOOKEENONE Material : Iron ModelNumber : 120609XH10 NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : AUSD505400000 ProductDescription : Features: Good quality super strong CNC flexible shaft couplings are suitable for high torque bush-less motor such as 4092 5684, 5694. The shaft hole is designed with negative tolerance, The shaft hole is 0.02mm smaller than the remark diameter for tighter installation, If you find it difficult to install, please heat it to 200-300℃ before installing. Size: 5mm to 4.76mm Fits 4.76mm (3/16") flexible shaft