... 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. ... bsp, bspt 4) Material of the case, roll ring and flange: stainless steel5) Material of the connection and internal: brass, chrome ...