Pressure Gauge Centre Back Connection Dia.2.5 4 Dia. 6 Range Normal 0....to....1500 bar Vaccum 76cmHg .... 0 Compound 76cmhg...0...35 bar Scale Bar psi Kg cm2 Kpa Mpa Center Back Connection Body SUS 304 Connection Centre Back with U Clamp Brass 1 2 NPT 3 8 Glycerin filled or dried with filling hole