4" In-Line BlowerInlet/Outlet - 4"CFM - 240Johnson Pump in-line blowers provide ventilation for bilges, engine compartments, galleys, and heads.Made from high quality ABS plastic construction, corrosion resistant motors, and premium electrical connections completes these blowersFive blade, quiet, highly efficient, and reliable operation will provide years of long lifeCompact and with mounting feet makes it easy to install on any flat surface