Material: Made from aluminum alloy, this timing pulley is designed to withstand high temperatures and resist wear, ensuring long-term performance. Compatible Design: Specifically designed for use with 6mm wide GT2 timing belts, this 3D printer pulley ensures smooth and efficient power transmission in your 3D printer or other machinery. High Performance: Features a uniform tooth surface that minimizes the risk of slipping and works effectively with the timing belt. Easy Installation: Equipped with an M3 set screw, this replacement pulley provides a secure fit on your motor shaft, preventing slippage during operation for reliable performance. Pack: This set includes 10 GT2 timing belt pulleys to help maintain consistent equipment operation. Specification: Material: Aluminum Alloy Size: Diameter x Height 1.3cm x 1.4cm (0.51 inch x 0.55 inch), Inner Hole 0.5cm (0.20 inch) Package Includes: 10 x GT2 Timing Pulley Note: Please allow slight measurement deviations of 1-2cm (0.39-0.79 inch) due to manual measurement.