Feature:1. Industrial robot gear replacement, a true maker is about integrating and repurposing.2. Adopts premium brass material, with good durability, long service life.3. This MOD 0.8 gear, while aesthetically unique compared to the larger gears, will operate the same.4. If the D‑bore pinion gears just won’t fit your motor or axle that you’ve chosen to use in your project, check out these 6mm round bore gears.5. The central hole diameter is 6mm, easy to install and disassemble, it is an excellent accessory for industrial robots. Specification:Item Type: Industrial Robot PartsMaterial: BrassProduct Model: 4304-0006-0015Product Specifications: 6mm Round Hole, Modulus 0.8 Center Hole Diameter: Approx. 6mm / 0.24inOuter Diameter: Approx. 13.6mm / 0.54inPitch Diameter: Approx. 12mm / 0.47inPackage List:1 x Gear