The Bosch SP0F000010 is a Temperature Sender. It is for use with electrical water temperature gauges. Standard adapter with 1/8" NPT. If metric adapter is needed for your application, use adapter kit SP0F000009. Bosch is known for precision, engineering, and innovation. Add style and you have the first-ever line of Bosch gauges, including replacement tachometers, speedometers, temperature and pressure gauges for all applications. Bosch Branded Gauges represent the latest in design following our 100+ year history of Automotive, Industrial, and Racing products.