Specification Brand : Generic BulletPoint1 : Transfer your servo's torsion into gear trains with these MOD 0.8 servo gears. BulletPoint2 : This reduction increases the torsion on the hub gear to seven times what the servo generates. BulletPoint3 : This 15 tooth servo gear is most commonly used to drive the hub gear with 105 teeth spaced at 48mm to achieve a gear ratio of 7:1. BulletPoint4 : Small and light, easy to carry and convenient to install, has good performance and can meet your needs. BulletPoint5 : The gears are made of high quality cast steel, are more robust, have high hardness and are . ItemName : 4307-1025-0015 15 Teeth Cast Steel Power Steering Gear with 25 Teeth Spline MOD 0.8 ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 4 centimeters ItemPackageDimensions_Width : 4 centimeters ItemTypeKeyword : robot-parts Manufacturer : Generic ModelName : OPPWONG4niskm2wb1 ModelNumber : Generic9g3ektuh1p PartNumber : Generic9g3ektuh1p ProductDescription : 1. The gears are made of high quality cast steel, have greater strength, high hardness and are . 2. Transfer your servo's torsion into gear trains with these MOD 0.8 servo gears. 3. This 15 teeth servo gear is most commonly used to drive the 105 teeth hub gear at 48mm pitch to achieve 7:1 gear ratio. 4. This reduction increases the torsion on the hub gear to seven times what the servo produces. 5. Small and light, easy to carry and convenient to install, has good performance and can meet your needs.