Autometer Phantom 100-250 Electric Water Temp Gauge2 1 16 in. diameter, 100 to 250 degrees F, electric, Phantom series, water temperature gauge. This Phantom gauge is designed for that Pro Street car, truck and street rod. It's a no nonsense, race quality gauge with a crisp, modern appearance. Uniform soft glow lighting along with the included red and green light bulb covers provide a personalized effect.