... Gauge for Chemical Use (Dia. 63,100,150mm Acc.1,6/1.0) Bourdon Tube Pressure Gauge for Chemical Use (Dia ... . 63,100,150mm Acc.1,6/1.0)Dia.63mm100mm150mmCaseSt.St. with BajonettringMeasuring SystemSt.St.Measure ... (psi, 1bs, kg/cm2...)Connection threadBrass, G1/4", G3/8", NPT, BSPT... St.St.Brass, G1/2", G1/4", NPT, BSPT... St.St ...