CNC machining of aluminum alloy Equipped with adjustable mounting hole POM base plate Compact design, small size, minimal space occupation within the frame, avoiding interference as much as possible Using dual electric adjustment and dual motors to independently control the front and rear axles, achieving DIG and Overdrive, and hybrid controls Suggest using portal axle for assembly, using two A32 climbing car electric adjusters, or Dual Crawler ESC, an integrated dual electric adjusters, paired with two external rotor motors (up to a maximum outer diameter of 36m, specific dimensions depending on frame width), and using a remote control with hybrid control function with three or more channels (Additional lubricating grease can be added before use to reduce the noise of metal gear meshing) Usage scenario: Low center of /performance chassis Motor teeth: 9T 32P Gear ratio: 9:1 Compatible motor: outer rotor (3.17mm D-axis) Output shaft: 4.9mm Bottom plate width: 72mm Colour:Black Material:Aluminum Alloy Screw color with the factory, does not affect the use, don't accept the specified Package Contents: 1 x Transmission Dig Overdrive Gearbox Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.