... ;3. Case Material: 304 stainless steel case, it can take with back flange; Bezel material: Stainless steel bezel4. Tube and socket: Phosphor ... bronze and brass5. Liquid Filling: With or without liquid, glycerine., silicone oil6. Connection: 1/8, 1 ... , 1/2, inches BSP, NPT or BSPT7. Type: Bottom or Back( Radial or Axial)8. Scale ranges: Vacuum and compound -1 ...