5 HP Air Compressor Pump, 1-Stage, Model APP3Y0518S by EMAX Air Compressor Solid cast iron air compressor pump with oil-lubricated design  Rated at up to 50,000 hours (based on B-to Bearing Life Rating) Flow-Tek concentric disc valves deliver maximum performance and longevity Cool-Tek Air Stream Technology provides 35% lower operating temperature, reduces moisture, and extends the life of the air compressor pump Ram-Tek Technology provides solid steel, heavy-gauge rods for maximum durability Comes with a reliable, two-year limited warranty