STURDY ALUMINUM STRUCTURE- The cylinder of our single stage air compressor pump, with the cast cylinder liner, features boron cast iron material. Its shell is of heavy aluminum structure, durable and easy to maintain. Flow Rate: 11 CFM, Maximum Working Pressure: 116PSI. Lubrication method: oil lubricated air compressor, Fast heat dissipation design: Large heat sink design. DOUBLE-CYLINDER DESIGN- The air compressor pump, which adopts two cast-iron cylinders and a cylinder head with die-casting technology, has a strong heat dissipation function, and it operates stably and quietly. SMOOTH OPERATION- Thanks to the high-quality crankshaft connecting rod of the piston machine and proven belt pulley drive design, this 3hp compressor pump is built with strong wear resistance, good compression performance, and smooth operation. SCIENTIFIC DESIGN- With tapered roller bearing, needle bearing piston ring, and control elements, our 3hp compressor has high bearing capacity