Propane Adapter Fitting. Excess Flow, Tee Style, Male POL (Prest-O-Lite) Inlet x 1/4 Inch Female Inverted Flare Auxiliary Inlet With Check Valve x Female POL Outlet x 1 Inch-20 MNPT Outlet. Material is Brass, With Plastic Handwheel, 0.9 Gallon Per Minute.