Tainless steel valves, not rusty. Light-weight and compact design. Huge air cylinder working pressure 150psi. Accurate pressure gauge, standard NPT accessories. wd tires from the plane to full of gas, just 40psi and 2-3 minutes to fill ful of it. Notice: Actual air pressure may be slightly different from the theoretical air pressure. Specifications: Item Size:24.5x9.3x15.5cm Material: Metal and Plastic Motor Type: Permanent magnetic Voltage range: DC12V-15V Air volume capacity: 55L/Min Air pressure: 150 PSI Current Consumption: MAX.23Amp Max Working Pressure: 150PSI Max.Duty Cycle( C and 100PSI):33% Included: 1 x Air Compressors With Car Charger 1 x Battery Clip 1 x Extension Tube 1 x Screw Pack 1 x User Manual