The Black Diamond Pressure Switch is a genuine replacement part designed to regulate air pressure and maintain proper operation of your air compressor. Operating within a pressure range of 105–135 PSI, this durable 4 port pressure switch with an integrated bleeder allows the compressor motor to cycle on and off at the correct pressure levels for efficient performance. Ideal for replacing a faulty switch when the motor cuts out too early or fails to start at the proper PSI, it provides long lasting, reliable operation to help keep your compressor running at its best.