ISSPRO's "Classic" Series gauges have been widely used by many heavy duty OEM's for decades. Known for their rugged reliability, wide selection and availability, the classic series has set the standard in the automotive instrumentation market.Used for the following Vehicle(s):UniversalQuick View:Threading: 1/8" NPTFTerminal: 2 - 1/4" BladesCalibration: 8 PSINormally Closed, Heavy Duty