Ordering Description Product number Description: Victor Professional Flow Meter FM 372, Three Gas Calibration, 40/50/150 SCFH, CO2/Ar/He, 1/4 NPT Inlet, 5/8-18 RH(F) Outlet Product number: 1000-0182 Description: Victor Professional Flow Meter FM 135, Two Gas Calibration, 18/50 SCFH, Ar/He, 9/16-18 RH (F) Inlet, 5/8-18 RH (F) Outlet Product number: 1000-0255 Description: Victor Professional Flow Meter FM 145, Two Gas Calibration, 18/50 SCFH, Ar/He, 5/8-18 RH (M) Inlet, 5/8-18 RH (F) Outlet Product number: 1000-0256 Description: Victor Professional Flow Meter FM 155, Two Gas Calibration, 18/50 SCFH, Ar/He, 1/4 NPT Inlet, 5/8-18 RH(F) Outlet Product number: 1000-0257 Description: Victor Professional Flow Meter FM 370, Three Gas Calibration, 40/50/150 SCFH, CO2/Ar/He, 9/16-18 RH (F) Inlet, 5/8-18 RH (F) Outlet Product number: 1000-0258 Description: Victor Professional Flow Meter FM 371, Three Gas Calibration, 40/50/150 SCFH, CO2/Ar/He, 5/8-18 RH (M) Inlet, 5/8-18 RH (F) Outlet Product number: 1000-0259 Description: Victor Professional Flow Meter FM 137, Two Gas Calibration, 65/200, Ar/He, 9/16-18 RH (F) Inlet, 5/8-18 RH (F) Outlet Product number: 1000-0261 Description: Victor Professional Flow Meter FM 147, Two Gas Calibration, 70/200, Ar/He, 5/8-18 RH (M) Inlet, 5/8-18 RH (F) Outlet Product number: 1000-0262 Description: Victor Professional Flow Meter FM 157, Two Gas Calibration, 65/200, Ar/He, 1/4 NPT (M) Inlet, 5/8-18 RH(F) Outlet Product number: 1000-0263 Description: Victor Professional Flow Meter FM 200, Single Gas Calibration, 100 SCFH, CO2, 1/4 NPT (M) Inlet, 5/8-18 RH(F) Outlet Product number: 1000-0264 Description: Victor Professional Flow Meter FM 150, Two Gas Calibration, 60/60, Air/Ni, 1/4 NPT (M) Inlet, 5/8-18 RH(F) Outlet Product number: 1000-0268