Make of Metal,with a wear resistant,scratch resistant,resistant,and outer shell. Accurate measurement of water temperature,easy installation,and clear readings. Our water temp gauge allows you to monitors your vehicle's engine coolant temperature to ensures it not overheats,potentially causing engine damage. This water temperature gauge is used for measure water temp of a car,measurement ranges is 40-120℃. Suitable for most of 12V/24V car or motors.