Model 801DB-F Model 825D-F Model 601D-F Model 821DE-F Model 811-F Model 601-L Model 2555 Model 355-2 Model 356 Model 4F Model 55-2                             Single Stage Regulator with a Model 55 type Flowmeter For use with 5500 PSIG cylinders 3 Year Warranty       ORDERING INFORMATION   PART NO. MOD EL NO. GAS FLOW  CAP.  SCFH SUPPLY PRESSURE GAUGE PSIG INLET CONN. OUTLET CONN. 3102555 2555-AR70-680 Argon/Helium 0-70 @ 20 PSIG 4000 CGA 680 5/8” - 18 (F)