Features Material: The synchronizing wheel is made of high-quality aluminum alloy, the surface is oxidized, durable, fine workmanship and high transmission precision, including 20/60 tooth synchronous wheel and 3 synchronous belts. Accurate Transmission: No slippage during work, stable transmission, precise tooth pitch, high transmission efficiency, good energy saving effect, reliable and durable use. Function: GT2 16-tooth timing pulley provides a smoother transition between belts, providing good performance for 3D printers, high transmission efficiency, and good energy-saving effect. Simple Structure: Easy to install, easy to assemble and disassemble, perfect to replace the old or broken, direct decoration. The GT2 timing pulley system is particularly suitable for linear motion and positioning. Application Range: Widely used in milling machines, gear shaping machines, drilling machines, gear hobbing machines or other mechanical transmission occasions. Specification: Item Type: Timing Belt Pulley Material: Aluminum Alloy Teeth: 60 years & 20 teeth Pitch: Approx. 2mm / 0.08in Aperture: Approx. 8mm / 0.31in Belt Width: Approx. 6mm / 0.24in Belt Length: Approx. 610mm / 24.02in; 852mm / 33.54in; 1220mm / 48.03in Specification: 3pcs / set Package List: 3 x 20 Teeth Synchronous Wheel 3 x 60 Teeth Synchronous Wheel 3 x Belt  Package List 3 x 20 Teeth Synchronous Wheel 3 x 60 Teeth Synchronous Wheel 3 x Belt