... Brass /SS connection, 3. Glycerine/Dry,with Flange or Bracket 4.CE Rohs Pressure Gauge/Manometer SpecificationTemperature Gauge/Thermometer SpecificationSizes of Case ... :2"/50mm, 2.5"/63mm,3"/75mm, 4"/ ... :Brass, Stainless SteelBrass, Stainless SteelThreads:1/8",1/4",3/8",1/2",BSP,NPT,G1/2…,M20* ...