Original Engine Management 8375 Water Temp Switch Temperature Switches are calibrated from -40C to 125C to match O.E. resistance characteristics ensuring proper fuel mixture and ignition timing under all climatic conditions. Excellent quality &amp; materials. Manufactured to meet expectations for fit, form, and function Brass housing for corrosion resistance Brass or nickel-plated terminals for superior conductivity Special-design thermister for accurate operation over entire operating range