... ) with 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 case, it ... : phosphor bronze and brass Movement: brass Liquid: glycerin or silicone oil Connection: 1/8, 1/4, 3/8, 1/2-inch, BSP ... , U-Clamp, restrictors, special connections and more Stainless steel liquid Filled Gauge