Specification Brand : Garosa BulletPoint1 : brand new and . BulletPoint2 : Made of premium metal material, it is and has long service life. BulletPoint3 : This joint or coupling connects rods whose axes are inclined to each other. BulletPoint4 : Widely used for connecting model cars, model ships, robots, etc. BulletPoint5 : It is commonly used for shafts that transmitmotion. Color : 2.3mm-2.3mm DriveSystem : External Hex ExteriorFinish : Nickel ExternallyAssignedProductIdentifier : 9088954648401 ItemName : U Joint, 4pcs Universal Joint Shaft Coupler, Connects Rods at Inclines, for Model Cars, Ships, Robots, Universal Joints (Inner Diameter 5 * 5mm) ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 7 centimeters ItemPackageDimensions_Width : 3 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : pin-and-block-universal-joints Manufacturer : Garosa Material : Iron Material1 : Steel Material2 : Iron MetalType : Iron MetalType1 : Alloy Steel MetalType2 : Iron ModelNumber : Garosatde1u5mg2w-05 NumberOfItems : 1 PartNumber : Garosatde1u5mg2w-05 ProductDescription : Specification: Material: Nickle plated iron Inner Diameter: 4*6mm, 5*6mm, 6*6mm, 3*5mm, 4*5mm, 5*5mm (Optional) Length: 23mm / 0.9in Outer Diameter: 11mm / 0.4in Weight: 42g~46g / 1.5oz~1.6oz (approx.)