1、Steel Material: Made of high quality steel material with high strength and wear resistance, having a good performance for long service life. 2、Main Function: Can play the role of deceleration and increase the engine torque force, improving the remote control vehicle and enhancing your using experience. 3、Specially Designed: Designed for a more efficient deceleration power, which can be used to change speed for providing smoother ride, lower revs and higher torque. 4、Working Performance: Manufactured with accurate shape and size, able to provide a balanced ride that maximizes the deceleration performance of the remote control vehicle. 5、Easy to Use: Simple for installation and removal, can be used to replace the original old or damaged part for better performance and using experience. Item Type: RC Center Spool Gear Set Material: Steel Color: Black Teeth: 35T Application: for ZD Racing EX-07 1/7 Model Vehicle Gross Weight: Approx.78g/2.8oz Bearing Size: 16x8x5mm/0.6x0.3x0.2in Bearing To Bearing Distance: 34mm/1.3in Product Size: 65x37mm/2.6x1.5in 1 x RC Center Spool Gear Set 2 x Washer