Features These D-bore gears match the shaft profiles to create a form-fitting drive between the shaft and gear. This 24 tooth MOD 0.8 gear fits any gear with MOD 0.8. Good replacement parts for industrial robots This combo produces a 4:1 gear ratio, underdrive, or overdrive, depending on whether you want to increase speed or maximize torsion. Small and lightweight, easy to carry and convenient to install, has good performance. After a strict manufacturing process made of high quality brass material, hard and durable, it has a long service life. Specification: Element Type: Sprocket Material: brass. Product Model: 4301-0006-0024 Product specifications: 6mm D type hole, module 0.8 Package list: 1 x chain wheel. Note:1. Please allow 1-2 errors due to manual measurement. Thank you for your understanding.2. Monitors are calibrated differently, the colour of the item shown in the photos may differ slightly from the actual object. Please take the real one as standard. Package List 1 x Sprocket