... :1.5", 2", 2.5", 3", 4", 5", 6" 2.case:SS304 3.internals: brass 4.liquid filled pressure oil filled ... :1.5", 2", 2.5", 3", 4", 5", 6"2.case:SS304 3.internals: brass, phosphor bronze, stainless steel4.liquid filled ... , PF), PS, BSPT, UNF. 7.connection mountain: bottom, center back8.case and rolling bezel: 304 stainless steel, 316 stainless steel9.connection ...