... SS or half SS 4.Customize All stainless steel diaphragm gas pressure meter1) Size: From 2.5" to 6"2) Pressure ... ;4) Thread: BSP, NPT, BSPT, PT, G, and M; Back connection; 5) Bourdon Tube: Stainless Steel material6) Higher Case : Stainless steel ... : 304 St St material14) Diaphragm Seal: 316 St St material15) Connection Type: One connection welded to the case All stainless steel diaphragm ...