4 thickened hydraulic metal shock absorbers to increase the friction of the four wheels. All-metal chassis, with a wealth of mounting holes, you can also punch by yourself. Package List: -1 x Bottom Metal Chassis -1 x Motor Bracket -4 x U-shaped Bracket -2 x U-shaped Shock Absorption Bracket -2 x Shock Absorber -4 x GA25 Motor -4 x Mecanum Wheel 97mm -4 x Coupling -4 x Flange Bearing -1 x Rocker Switch -5 x M2.5×14mm Screws -5 x M2.5x 16mm Screws -9 x M3×5mm Flat Head Screws -20 x M3x 10mm Screws -10 x M25 Nut -18 x M3 Nut -2 x 22AWG Wire 20cm -6 x Cable Tie -1 x Phillips Sleeve -1 x Screwdriver Note: -The wheel hub is made of ABS plastic. The product is not assembled.Usually it cost about 35USD-50USD. If you receive defective item, please kindly notify us within 14 days. The item "Omnidirectional Mecanum Wheel Robot Car Chassis Kit For Arduino Suspension pan" is in sale since Sunday, September 27, 2020. This item is in the category "Business & Industrie\Automation, Antriebe & Motoren\Industrielle Roboterarme". The seller is "panda201898" and is located in Shenzhen. This item can be shipped worldwide.