... -650C 3,Connection:buttom 4,Oil filled exhaust gas dial thermometersexhaust gas dial thermometers specification: Dial Size:3", 4" 5", 6" Stem diameter:Φ6 ... Info:Other materials, ranges, connections are available upon requestexhaust gas dial thermometer picture: Why Choose us?Hangzhou Huatong Meter Co., Ltd ... leading supplier in this field already. High quality exhaust gas dial thermometer