Molded float is impervious to petroleum products. Tangle-Free Solid Link hinge withstands rough handling. Durable cast iron with corrosion-resistant powder coating. Large, easy-to-read, plastic vial includes UV inhibitors and is the most break-resistant on the market. 2 rubber gaskets enable the gauge to meet up to 5 P.S.I. air test requirements. All OEM KING combination alarms/gauges are available in configurations compatible with Scully Signal Corp's Scul-Tel and Intelli-Tank products. Vertical, fits tanks with 42" to 44" diameter.