Feature:1. The gears are constructed of high quality cast steel, greater strength, high hardness and durable.2. Transfer the torsion of your servo into gear trains with these MOD 0.8 servo gears.3. This 15 tooth servo gear is most commonly used to drive the 105 tooth hub gear, spaced 48mm away, in order to create a 7:1 ratio.4. This gear reduction will increase the torsion at the hub gear to 7x what the servo produces.5. Small and light, easy to carry and convenient for installation, has good performance, can meet your demands.Specification:Item Type: Servo GearMaterial: Cast SteelThickness: Approx.6mm / 0.24inProduct Model: 4307-1025-0015Product Specifications: 15 Teeth Servo Gear 25 Teeth Spline MOD 0.8 Package List:1 x Servo Gear