Features 1、Adopt high quality aluminum, excellently machined, finished smoothly 2、This pulley is for 6mm width GT2 timing belt 3、Each of the two sides of the wheels were mounted bearings 4、H-type synchronous pulley wheel 5、Perfect choice for building a 3D printer or similar projects Specification Description: This is synchronous aluminum belt pulley is designed for 3D printer. It is an 3D printer accessory for 6mm wide belt with 20 teeth. As an H-type synchronous pulley wheel, you will find it perfect for 3D printer or similar projects. Features: Adopt high quality aluminum, excellently machined, finished smoothly. This pulley is for 6mm width GT2 timing belt. H-type synchronous pulley wheel. Each of the two sides of the wheels were mounted bearings. Perfect choice for building a 3D printer or similar projects. Specifications: Material: Aluminum Alloy Tooth: 20 (T) Pitch: 2mm / 0.078" Inner Diameter: 5mm / 0.196" Belt Width: 6mm / 0.236" Overall Size: 18 x 8mm / 0.7 x 0.31" Weight: 8g(approx.) Package Includes: 2 x Belt Pulleys Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List