Pressure Gauges (Manometer) for Gas Regulators Case sizes: 2"(50mm), "2 1/2" (63mm) Case and ring: black steel, chrome-plated steel, stainless steel Windows: glass, acrylic, polycarbonate Internal: brass, phosphor bronze, 304-casseTTs mechanism, 316 tie-in Connection:1/8, 1/4, 3/8, NPT, BSPT, BSP dependent on model and size, bottom, back, left and right side Ranges: 0-2kg/m² to 0-400kg/m² Accuracy: 2.5%-1.6% Scale: psi, bar, mpa, kpa, kg/cm².hg single or dual scale or according to customers' order