Specification Brand : ANCIRS BulletPoint1 : 【Sturdy Material】 Ancirs coupling connector is made of fine plating steel, heat and electroplated process make it sturdiness and insulation, striking shaft more stable and easy for installment and replacement. BulletPoint2 : 【Wide Range of Use】Ancirs flange coupler is produced based on International Flange Standard, widely used in model shaft connection, perfect accessories for RC Model motor. BulletPoint3 : 【High cost performance】Ancirs flange coupler is packaged with 4 pack 6mm Flange Shaft Coupling + 4x M3 Mini Hex Wrench + 8 x M3 Fastening Screw. BulletPoint4 : 【Standard Specification】Inner Diameter: 6mm. Cylinder Outer Diameter: 10mm. Cylinder Height: 10mm. Base Diameter: 22mm. Base Height: 2mm. BulletPoint5 : 【Satisfaction Guarantee】 If you are not completely satisfied with ANCIRS Flange Coupling Connector, just contact us through Amazon message and we will provide feasible solution for you as promised. Color : Silver DriveSystem : External Hex ExteriorFinish : Silver ExternallyAssignedProductIdentifier1 : 717877039278 ExternallyAssignedProductIdentifier2 : 0717877039278 FinishType : silver ItemName : 4 Pack 6mm Flange Coupling Connector, Rigid Guide Steel Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors, High Hardness Coupling Connector-Silver. ItemPackageDimensions_Height : 13.97 centimeters ItemPackageDimensions_Length : 1.27 centimeters ItemPackageDimensions_Width : 10.922 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : ANCIRS Material : Aluminum MeasurementSystem : Metric MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Alloy Steel MetalType1 : Iron MetalType2 : Brass ModelNumber : YJ0273MA-AN-M NumberOfItems : 1 NumberOfPieces : 4 PartNumber : YJ0273MA-AN-M ProductDescription : 4 Pack 6mm Flange Coupling Connector, Rigid Guide Steel Model Coupler Accessory, Shaft Axis Fittings for DIY RC Model Motors, High Hardness Coupling Connector-Silver. ProductSiteLaunchDate : 2019-03-08T08:00:00.000Z Size : 5mm to 6mm SpecificationMet : Iso/Iso 9001 Style : D20 L25 SupplierDeclaredDgHzRegulation : not_applicable