Mophorn High Pressure Air Pump 80 Gallon Vertical Air Compressor Solid CAST IRON twin cylinder pump ? Up to 10,000* hours of extended life* Over 35% quieter and 60 degrees cooler than aluminum pumps with cast iron cylinder sleeves. * Based on B-10 bearing rating Cast iron, oil-lubricated pump for quiet operation and long life Durable 80-gallon ASME code tank Automotive style changeable air filter CAMY9