Check the listing for details. Universal 4 Port Air Compressor Pressure Switch Replacement Control NPT1/4. Color: Black, Condition: New. Listed at 12.59 USD. 【EASY TO INSTALL】Compressor Pressure Switch With its 4-port design and compatibility with NPT 1/4 fittings, installation was straightforward and to "dial in" for cut-in/cut out.air compressor pressure switch The four-port Manifold Gives You the Option to Mount in it Any Direction and to Also Have the Option to Add a Relief Valve, Gauge, or Multiple Air Outlet Ports.【EASY TO INSTALL】Compressor Pressure Switch With its 4-port design and compatibility with NPT 1/4 fittings, installation was straightforward and to "dial in" for cut-in/cut out.air compressor pressure switch The four-port Manifold Gives You the Option to Mount in it Any Direction and to Also Have the Option to Add a Relief Valve, Gauge, or Multiple Air Outlet Ports.