This Defi Racer Gauges set (white) includes three dials for measuring temperature, pressure, and voltage. The gauges are 60mm size. They are also equipped with illuminated (backlit) functionality. The gauges come with an install kit (fixing bolts, mounting hardware, fixing nuts, hoses, and lines.) Universal fitment. ONLY FOR USE IN 12V POWER VEHICLES. The manufacturer part numbers for this set are DF11706, DF11606, and DF11903. These gauges are stand alone/plug and play units, and DO NOT require the Defi-Link Advance Control Unit. Sensor thread size: 1/8PT. Commercial sensor attachments are required for the pressure/temperature sensors, and are not included.