... 10",CASE MATERIAL: Steel case, steel black case, steel chrome plate case Product Explanation:CASE SIZES: 1.5", 2", ... 10", CASE MATERIAL: Steel case, steel black case, steel chrome plated case TUBE& SOCKET: Brass, stainless steel, steel with nickel ... plated, 316 stainless steel,phosphor bronze and so on. Element: ... .0,1.6,2.5,4.0 gas pressure gauge