The GT2 Timing Pulley 36T Spindle Coupling Wheel is a high-quality timing belt pulley designed for industrial automation and motion control systems. With a 5mm bore size compatible with 6mm belts, this pulley is perfect for precision timing and smooth motion in machinery and equipment. Made in China, this lot of 5 pulleys ensures durability and reliability for your power transmission needs. The GT2 model provides a reliable and efficient solution for your pulley requirements in various industrial applications.