M.B. Sturgis Inc. POL (Full Flow) X 1/4" MN Propane Adapter Fitting; For Use With Horizontal 2-Stage Regulators; POL (Prest-O-Lite) With O-Ring x 1/4 Inch Male NPT; Brass; 500000 BTU/Hour; UL/CSA Listed Used To Connect LP Cylinders To Regulators, Hoses And Other LP Fittings Soft-Nose P.O.L. Tank Connector Is Used When Maximum Gas Flow Is Needed Allows Open Gas Flow At Tank Pressure And Will Not Go Into Bypass Mode