General description AlwaysH 5Pcs 3D Printer Accessories include 2GT Aluminum Timing Pulleys designed for various projects, particularly in 3D printing. This set contains five high-quality aluminum alloy pulleys that are finely crafted for durability and performance. Technical specifications Tooth shape: 2GT Number of teeth: 20 Inner diameter: 5mm Outer diameter: 18mm Height: 9mm Package quantity: 5 pulleys Usage Ideal for building 3D printers or similar projects. Can serve as replacement parts for old or broken 3D printer drivers.