... 3. Glycerine filled/fillable 4. SS/Brass Connection Oil filled Pressure Gauges are used in Air compressors, Hydraulic Oil Press,Injection Moulding ... ,2”/50MMCase material: Stainless steel case, it can take with back flange and U-clamp Bezel material: 304SS Bezel material: Steel roll ... and accessories: Custom dial, metric scale, DIN 1.6% accuracy, U-Clamp, restrictors, special connections and more