RPS-IND 4PCS GT2 Timing Pulleys 20 Teeth 10mm Width 5mm Bore Aluminum Synchronous Wheels with 2PCS398mm GT2 Belts and Hex Key for 3D Printer DIY Projects

["Complete 4-Piece Set - Includes 4 aluminum GT2 timing pulleys (20 teeth each) with 2 matching 398 mm GT2 belts and a hex key for easy installation","Premium Aluminum Construction - Made from high-quality aluminum alloy with oxidation surface treatment for durability, precise tooth pitch ensures smooth and accurate transmission without slipping","Professional 10mm Width Design - Features 10mm belt width (wider than standard 6mm) for enhanced stability and load capacity, 5mm bore fits standard motor shafts perfectly for 3D printers and DIY machinery","Versatile DIY Applications - Ideal for 3D printer upgrades, CNC machines, robotics projects, milling machines, and various mechanical transmission systems used by makers, hobbyists, and engineers","Easy Installation & Wide Compatibility - Comes with necessary hex key for quick assembly, compatible with most GT2 belt systems and standard 5mm shaft motors, perfect for replacement or new builds"]