Feature:1. This pinion is made of steel and have a higher overall strength than brass or aluminum gears2. Works for transfering the torsion of your servo into a gear with these MOD 0.8 servo gears3. This 30 tooth servo gear most commonly used to drive the 90 tooth hub gear, spaced 48mm away, in order to create a 3:1 ratio4. Servo spur gear possess stable structure, excellent performance and long service life5. Using advanced technology with great craftsmanship to bring surface, which will your hands in operateSpecification:Item Type: Spur GearMaterial: SteelModel: 4307-1025-0030Mod: 0.8Pitch Diameter: Approx. 24mm / 0.9inOuter Diameter: Approx. 25.6mm / 1inDiameter: Approx. 3mm / 0.1inSize: Approx. 6mm / 0.2in Package List:1 x Spur Gear