... (Dia. 63,75,100,150mm Acc.1,6) Bourdon Tube Pressure Gauge with Diaphragm(Dia. 63,75,100,150mm Acc.1,6)Dia ... .63mm75mm100mm150mmCaseSteel-black, Option: stainless steelSteel-black with bezel-ring, Option: stainless steelSteel-black with bayonet ring, Option: stainless steelMeasuring SystemBrass, Option ...