XiaoR Geek Robot Tracked Tank Chassis Kit This is an agile tracked chassis, low noise and easy to control, could be a good partner for your tank-liked robots. Specification: Base Material: aluminium alloyProcessing Method: electroplatingTrack: engineering plasticWheel: engineering plasticNet Weight: 1kgClimbing degree: 30 degreesProduct Size: 290 *250 *70mm(L*W*H) Motor parameter: Type: GM25-370Output rate: 150 + 10% for RPMLoad current: 200(Max)Locked-rotor current: 4500(Max)KgNaN locked-rotor torque: 9.5kgNaNLoad speed: 100 + 10%rpmThe load torque: 3000 gNaNLoad current: 1200(Max)Load noise: 56 dBWorking voltage: 9V Package includes: 1 x Screwdriver 2 x Motor 2 x Track 2 x Drive Wheel 6 x Driven Wheel 1 x Instruction 1 Set Base 1 Set Screw Accessory Size: Axis stretch size: 14.5 mmAxial clearance: 0.05-0.50 mmScrew size: M3.0Outer Diameter: 25mmShaft diameter : 4mm, D type(thick:3.5mm)Shaft length: 12mm, (D type:8 mm)