This Penn Baso head pressure control is the perfect addition to your HVAC and refrigeration system. Designed for use with 50/450 psig fans, this corded electric control ensures efficient and effective operation. The switch is compatible with a variety of models and is easy to install. With its reliable performance and high-quality construction, this head pressure control is a must-have for any HVAC and refrigeration professional. Whether you're looking to upgrade your system or replace a worn-out component, this Penn Baso control is the ideal choice.