This 1/4" NPT bottom connection pressure gauge features a 4.5" diameter dial and corrosion resistant stainless steel case and ring with plastic lens. Typical applications include but are not limited to; steam, water, air, oil, gas or any medium not corrosive to copper alloys. This pressure gauge features bold black and red numerals/graduations, 270° arc and balanced adjustable black indicator. Please note you may receive a "REED" branded product. This is the exact same pressure gauge as shown in this listing. This product includes a calibration certficate traceable to NIST (National Institute of Standards and Technology).