... -SS for anti-shock use, stainless steel case, roll ring and flange, polycarbonate window, brass or stainless Liquid Filled Gauge- ... SSFor anti-shock use, stainless steel case, roll ring and flange, polycarbonate window,brass or stainless steel internal and connection ... npt, bsp, bspt 4) Material of the case, roll ring and flange: stainless steel5) Material of the connection and internal: brass ...