Keep your favorite and most reliable ROLAIR compressor up and running even longer with the Rolair Single-Stage Compressor Pump with Flywheel. Save yourself ample time by not having to rebuild your entire compressor, and simply install this ready-made pump from Rolair. This replacement compressor pump is a single-stage, high-efficiency compressor with stainless steel valves and cast iron cylinders for long-term durability. The oil drain extension makes maintenance even easier. The Rolair compressor pump has a finned aftercooler for more efficient operations.It stores a total of 34 ounces of oil for heavy-duty usage. The two-cylinder compressor pump runs at only 1000 RPM and has a cast-aluminum crankcase for cooler running temperatures, which increases its overall lifespan. This single-stage compressor operates at a total PSI of 150 and has a CFM of up to 10.10. Its flywheel has a diameter of 11.5 inches.