The Black Diamond Pressure Switch is a genuine replacement part designed to regulate air pressure and ensure dependable operation of your air compressor. With a pressure range of 145–175 PSI, this durable 4 port pressure switch with an integrated bleeder allows the compressor motor to turn on and off at the correct pressure levels for optimal efficiency. Ideal for replacing a faulty switch when the motor cuts out unexpectedly or fails to start at the proper PSI, it provides long lasting performance to help keep your compressor running smoothly and reliably.