... ", 8", 10",CASE MATERIAL: Steel case, steel black case, steel chrome plate case Product Explanation:CASE SIZES: 1.5", 2", 2 ... ", 8", 10", CASE MATERIAL: Steel case, steel black case, steel chrome plated case TUBE& SOCKET: Brass, stainless steel, steel with nickel ... :1.0,1.6,2.5,4.0 gas pressure gauge