... Stainless Steel Bezel and Stainless Steel Roll Ring Liquid Filled GaugeCase sizes: 1.5, 2, 2.5, 3, 4 and 6 inches Case material: stainless steel ... Bezel material: stainless steel bezel, stainless steel roll ring or bayonet ring Tube and socket: phosphor bronze and brass Movement: brass Liquid: glycerin ... % accuracy, U-Clamp, restrictors, special connections and more Stainless steel liquid Filled Gauge