RV Trailer Camper Lp Gas 20 Pigtail Hp Pol Lp 100019-20PKG Propane Hose; Propane Feed; For Connecting Dual LP Cylinder To Two-Stage Regulator; POL(Prest-O-Lite) x 1/4 Inch Inverted Flare; 20 Inch Length; 500000 SCFH; Maximum 350 PSI; Temperature Range -40 Degree Fahrenheit To 140 Degree Fahrenheit Used To Connect A Dual LP Cylinder System To The Two-Stage Regulator The POL Tank Connection Allows A Higher Flow Of Gas Than The Type 1 Needed When By-Pass Issues Arise Due To A High Demand Of LP Gas From The RV Appliances