Viair 90103 165/200 PSI Pressure Switch Pressure switch turns air compressor on at 165 PSI, off at 200 PSI 1/8 inch male NPT sensor port fitting plumbs directly to air tank/reservoir For use with compressors up to 20 ampere (over 20 ampere, a relay must be used) Two spade positive terminals for switch connection Use thread locker only for installation (no Teflon tape)