Features: Brand new and high quality Made of high quality aluminum; Solid and durable; Surface Treatment: anodizing, long service life and excellent performance. Accurate transmission,without slipping at work, having a constant gear ratio; High transmission efficiency, energy-saving effect. Easy to assemble and disassemble. Widely used in milling machine, gear shapers, drilling machine, hobbing machine or other machine transmission occasions. Compacts and versatiled unit is easy install and maintain. Specifications: Material:Aluminum Color:Red/Black/Silver Model number : 2GT Pitch: 2mm Teeth: 80 Width: 6mm Dia:Approx.54.8mm/21.57inches Package Includes: 1x Synchronous Wheel note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.