Feature:1. 20 teeth MOD 0.8 gear, it will match with any MOD 0.8 gear, reliable to use.2. Made of premium brass material, antirust, anti‑corrosion and durable.3. Easy to install, no complicated tools required, convenient to use.4. This combo will create a 5:1 ratio, underdrive or overdrive depending on whether you're set out to increase the speed or maximize torsion.5. Manufactured according to the original production specifications, in line with strict quality standards.Specification:Item Type: GearMaterial: BrassModel: 4301-0006-0020Specification: 6mm/0.2in D-Bore, 0.8 MOD Application: If you’re using a motor with a 6mm D-shaft as an output, or you have built your project using 6mm D-shafts as the axles, these D-bore gears match the shaft profiles in order to create a positive drive between the shaft and the gear. Package List:1 x Gear