Features High-Quality Aluminum Alloy: The pulley is meticulously crafted from aluminum alloy, providing anti-aging properties, high strength, and a prolonged service life, ensuring reliable performance. Reinforced Rubber Timing Belt: The closed timing belt features fiber-reinforced rubber, offering elasticity and exceptional working performance, enhancing the smooth and efficient transmission of power. Precision Transmission: The pulley set ensures smooth and non-slip transmission, with teeth pitch and a constant transmission ratio, delivering efficient and energy-saving . Easy Installation and Disassembly: The simple structure of the pulley kit, accompanied by a wrench, facilitates effortless installation and disassembly, making 3D printer maintenance more convenient. Versatile Mechanical Applications: This pulley kit is suitable for a wide range of applications, including 3D printers, milling machines, CNC lathes, and other mechanical transmission ocns, providing versatile and reliable performance. Features: 1、Aluminum Alloy Pulley: The pulley is fine made of aluminum alloy material, and the is oxidized, which is anti aging, has high strength and long service life. 2、Rubber Timing Belt: The closed timing belt adopts fiber reinforced rubber, which is full of elastic, provides excellent working performance. 3、High Performance: The pulley set transmits smoothly and non slip, with teeth pitch and constant transmission ratio, efficient and energy saving. 4、Easy Installation: The pulley kit is simple in structure, comes with a wrench, easy to install and disassemble, making your 3D printer work easier and more convenient. 5、Wide Purpose: This pulley kit can be widely used in 3D printer, milling machine, gear grinding machine, drilling machine, CNC lathe, gear hobbing machine or other mechanical transmission ocn. Specification: Item Type: Timing Pulley Set Material: Aluminum Alloy, Rubber Timing Belt: Length: Approx.280mm/11in Width: Approx.6mm/0.24in Number of Teeth: 20 and 60 teeth Screw: M4 Package List: 4 x Timing Pulley 2 x Belt 1 x Hex Wrench Package List 4 x Timing Pulley 2 x Belt 1 x Hex Wrench