... , 2.5, 3, 4 and 6 inches Case material: stainless steel case, it can take with front flange, back flange Bezel ... material: stainless steel bezel, stainless steel roll ring or bayonet ring Tube and socket: phosphor ... dial, metric scale, DIN 2.5% accuracy, U-Clamp, restrictors, special connections and more Stainless steel liquid Filled Gauge