LABIN GDP to provide for an equal distribution of each of GC gases like Air, N2, H2, He, Ar. & others. Especially uses for more than one GC Instruments.LABIN Provide 3 types of Model as per below. Model: T, TG, TGR Model: T (Only Shut-Off Valve) Model: TG (Only Shut-Off Valve & Pressure gauge) Model: TGR (Shut-Off Valve, Pressure gauge & Regulator) Gas Selector PanelLABIN Make Gas Selector Panel for changing the outlet carrier gas flow either Nitrogen or Helium gas without halting your analysis.