Features: <br>100% brand new and high quality. <br>This joint or coupling connects rigid rods whose axes are inclined to each other. <br>Made of premium metal material, it is durable and has long service life. <br>It is commonly used for shafts that transmit rotary motion. <br>Widely used for connecting model cars, model ships, robots, etc. <br> <br> <br>Specification: <br>Material: Nickle plated iron <br>Inner Diameter: 4*6mm, 5*6mm, 6*6mm, 3*5mm, 4*5mm, 5*5mm (Optional) <br>Length: 23mm / 0.9in <br>Outer Diameter: 11mm / 0.4in <br>Weight: 42g~46g / 1.5oz~1.6oz (approx.) <br> <br> <br>Package list: <br>4 * Universal Joints (with Set Screws) <br>1 * Hex Key<br>1、100% brand new and high quality. <br>2、This joint or coupling connects rigid rods whose axes are inclined to each other. <br>3、Made of premium metal material, it is durable and has long service life. <br>4、It is commonly used for shafts that transmit rotary motion. <br>5、Widely used for connecting model cars, model ships, robots, etc.