This QuickCar gauge is for measuring oil temperature. Display has 140°-340°F range and a 2-5/8" diameter. This is mechanical type gauge with a 6-1/2 foot capillary tube on the backside and comes with a brass 1/2"NPT adapter for putting it into the oil system. Sold each. *Individual gauges do not include warning switches. (PPM889-1355)