400,000 BTU max flow 2 - 1/4" Inverted Female Flare Inlets x 3/8" Female Pipe Outlet Propane level indicator located on top of regulator Includes backflow prevention fittings CSA certified Product Type LP Auto-Change High Capacity Two Stage Regulator Connection Type Threaded Connection Size 1/4; 3/8 inch Diameter 2 - 1/4" Inverted Female Flare Inlets x 3/8" Female Pipe Outlet inch Regulate Gas Pressure Going To A Destination, Propane