Two Stager Regualtor : 2 stage auto changeover regulator can secure a consistent inlet pressure between the first and second stage, and allow a smoother and greater propane gas flow capacity in to the appliances; Perfect replacement for single stage regulator Inlet & Outlet : Inlet to two-stage propane regulator: standard P.O.L. tank connection（Movable handwheel rotation, On the outlet end of the 2 stage propane regulator hose is a brass 3/8 inch female flare swivel Nut fitting Max BTU Flow : Providing 11" WC (1/2 Psi) low pressure output, with a maximum of 162000 BTU flow capacity Brass Adapter Fittings : 3/8" flare x 3/8" NPT male pipe.3/8" Female x 3/8" Male Street Elbow, 3/8" Male Flare x 1/2" NPT Female 90 Degree Elbow.Made of premium solid brass with a longer service life, stronger and more durable than iron and iron galvanized pipe fittings. Multifaceted Use: Compatible with Mr. Heater Corporation F273684 Vent Free Accessories connects vent free heaters to a remote LP tank; fits for Hater Portable Buddy and Big Buddy, Coleman Camping Stove, Blackstone Baking Pan, RV Appliances, Gas Grille, Gas Stove/Stove, Fire Pit, Propane Fireplace, Water Heater, etc.;The 12foot Mr. Hater series propane hose accessories can be used to connect 20-100Lb gas tanks Practicality:Can be used in commercial deep fryers, gas range stove to a remote LP tank, also convert your existing petrol generator to be using propane and gas generator Easy Installation : The P.O.L connector for two stage regulator is directly connected to the propane tank and can be connected to the propane tank without tools.just need to moanually tighten hand-wheel grip; allows you to use your larger propane tank 20lb.40lb.100lb.for use all converts POL LP Tank Service Valve two stage propane regulator with 12 Foot Hose and P.O.L adapter.3/8in male flare x 3/8in male NPT Fitting, and 3/8in Female x 3/8in Male Street Elbow. 1/2in Female NPT X 3/8in male flare