This set of synchronous wheel is made of aluminum alloy, excellently machined, finished smoothly and longer service life. Teeth timing pulley providing a smoother transition between belt, for 3d printers. It is suitable for linear movement and positioning. Features - ColorSilver - Material: Aluminium alloy. - Size: About 5.00X5.00X2.50cm/ 1.97X1.97X0.98inch. - Premium aluminium alloy material, durable, wear resistant for long-term use. - Accurate transmission, without slipping at work, having a constant gear ratio. - The product designed with smooth transmission, a buffer, damping capacity, low noise. - High transmission efficiency, energy-saving effect. - Widely used in milling machine, gear shaper, drilling machine, hobbing machine or other machinery transmission occasions. Package list: 3 x set of synchronous wheel