... : Stainless steel 6). Bezel : Stainless steel 7).Flange: Stainless steel 8). Bourdon tube : Phosphor bronze OR Stainless steel ≤ 60 bar: C ... ). Pointer: Aluminium ,black 13). Window: Glass Or Plastic 14).Thread: 1/8",1/4", 3/8",1/2", PT,BSP,NPT etc. 15 ...