oil filled pressure gauge 1.size:1.5", 2", 2.5", ... ", 6" 2.case:SS304 3.internals: brass 4.liquid filled pressure oil filled pressure gauge1.size:1.5", 2", 2.5", 3 ... :SS304 3.internals: brass, phosphor bronze, stainless steel4.liquid filled pressure5.connection size:1/8", 1/4", 3/8", ... threads: NPT, BSP(G, PF), PS, BSPT, UNF. 7.connection mountain: bottom, center back8.case and rolling bezel: 304 ...