Detailed Product Description Gas Filled Thermometer with CapillaryCase & ring: 304 or 316 stainless steel Front flange: 304 or 316 stainless steel with 3-hole type Bulb: 304 or 316 stainless steel with sliding gland Capillary: 304 Stainless steel with stainless steel spring armor, or 316 stainless steel with stainless steel interlocking armor Window: glass or Lexan plastic Pointer: adjustable, ...