1100% brand new and high quality. 2Made of premium metal material, it is durable and has long service life. 3This joint or coupling connects rigid rods whose axes are inclined to each other. 4It is commonly used for shafts that transmit rotary motion. 5Ideal accessories for RC model motor, such as model airplane, boats and robots.Features:100% brand new and high quality. Made of premium metal material, it is durable and has long service life. This joint or coupling connects rigid rods whose axes are inclined to each other. It is commonly used for shafts that transmit rotary motion. Ideal accessories for RC model motor, such as model airplane, boats and robots. Specification:Material: MetalWeight: Approx.128g/ 4.5ozLength: Approx.56mm/2.2inInside diameter: 12mm/0.47inOutside diameter: 24mm/0.94inPackage List:1 * Universal Joint2 * ScrewNote:Please allow slight error due to manual measurement. Thanks for your understanding.