Features: Brand new high quality Made of high-quality materials for durability Timing Pulley 20&36 Teeth 5mm Hole Timing Pulley with Belt/Wrench, 1 Set Synchronizer wheels are made of high-finish aluminum alloy. Used in conjunction with the timing belt to achieve synchronous transmission and smooth transmission engineering. Accurate and stable transmission, high efficiency, no sliding during operation, buffering and damping, low noise, easy maintenance, and no need for lubrication. Has a large power transmission range. Can be used for long distance transmission. Widely used in 3D printers, drilling machines, milling machines, gear machines, CNC lathes and other mechanical transmissions. Product parameters: Timing Pulley Specifications: Maximum Diameter: 16mm/0.63"; 25mm/1" Overall Height: 16mm/0.63in; 17mm/0.67in Slot width: 7mm/0.27inch Spacing: 2mm/0.08inch illustrate: Remove the pulley, install the belt on the pulley, then install the pulley on the shaft to fix it, and the wrench helps to install and remove the screws. Package Included: 1 * 20 teeth 5mm aperture synchro wheel 1 * 36 Teeth 5mm Bore Synchro Wheel 1 * 200mm long 6mm wide belt 1 * Wrench Note: 1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2.Please allow slight manual measurement deviation for the data. _x000D_