Item Type: Synchronous wheel <br>Material: Aluminum <br>Gross Weight: Approx. 11.00g <br>Packing Size: Approx. 3.00 x 3.00 x 2.00cm / 1.18 x1.18 x 0.79 in <br>Color: Silver <br>Size: Approx. 8mm / 0.31 in 20 teeth1、It is lightweight and sturdy, and 1/4 inch bore for NEMA 23 stepper motors. <br>2、Entitled with pratical adoptability, its high quality can keep its high performance for a long time, and it is durable. <br>3、Anodized surface treatment can make effective waterproof and rust-proof with corrosion-resistant performance, which is more beautiful and durable. <br>4、Made of aluminum materials in high quality, it is easy to use in the practical life. <br>5、The 20-tooth for GT3 timing pulley has a more powerful gear for higher torque applications.1 x Synchronous Wheel Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.