Auto Meter 7637 Sport-Comp II 2-5/8" 100-250 Degree F Short Sweep Electric Water Temperature Gauge Modern white LED through-the-dial lighting provides clear visibility during nighttime use 12 and 16 volt compatible, well-suited with nearly every street car or race car electrical system Gauge kit includes 1/8 NPT temperature sender, 3/8 and 1/2" NPT adapters, mounting hardware, and detailed instructions for installation Auto Meters race proven air-core electric instruments provide quick and accurate readings while keeping hazardous fluids outside of the vehicle