Generator Accessories descriptions We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Electric Motor Gearbox For Car. Features: *Perfect Electric Gearbox for Children's Cars. *The Intermediate Gear is Made of Metal and is More Wear-resistant *It Will Produce Relatively Low Noise and Have Higher Wear Resistance. *You Can Choose Different Speeds As Needed. *Applicable to Damaged or Old Replacement Parts. Specification: *Project Type: Motor Gearbox *Material: PP *Colour: Black (As Pictures Show) *Optional Types: *RS550: (10 Teeth) RS550 12V 12000RPM, RS550 12V 18000RPM, RS550 12V 23000RPM, RS550 12V 30000RPM *Inner Hole Diameter X Hole Diameter : 1.2x6.3cm *Length X Width : 18.5x9.3 Cm *Motor Diameter X Length : 3.5x8cm *RS390: (12 Teeth) RS390 12V 12000RPM, RS390 12V 16000RPM, RS390 12V 20000RPM, RS390 6V 18000RPM *Hole Diameter X Aperture : 1.0x6.1cm *Length : 16.5 Cm Package Contents: 1 * Electric Gearbox . Products number : SOMONO88360