Features: brand new and high quality High quality metal material, not easy to deform. A great and upgraded part for the rc model car, can replace the old or broken parts. Metal materials,stand wear and tear, durable in use and portable. Deeper and tighter threads allow better bite, enhancing fixation, not easy to slip. Smooth threads will reduce the resistance during installation, saving for time and improving efficiency. Specifications: Material:Metal Size:Gear:Approx.4.3x3.6cm/1.69x1.42in Motor Gear:Approx.1.5x1.2cm/0.59x0.47in Color:Black Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes: 1 Set Remote Control Kits