Oil Tank Gauge Fit for Scully Signal Corp's Scul-Tel and Intelli-Tank(Vertical Oil Tank) Replace the float level gauge on oil tank, measures tank level accurately and never guess your oil level again, cost effective and time saver. The heating oil fuel tank gauge is designed for the standard 275 or 330 vertical heating oil tank depth from 42" to 44" diameter, 1-1/2" and 2" Male NPT thread. The fuel tank pressure gauge is made of sturdy and durable steel, corrosion and rust resistant, the oil cap is high quality plastic, very thick, not easy to break, long service life, suitable for outdoor or basement tanks.