The Mr. Heater two stage auto-changeover regulator provides easy changeover from empty to full cylinder while providing adequate fuel to your RV. Features propane level indicator dual 1/4 In. inverted female flare inlets x 3/8 In. female pipe outlet and up to a 400 000 BTU max flow. CSA certified and includes backflow prevention fittings. Features Brass Adjustable Pressure Regulator Heater Parts/AccessSpecifications Connection Type: 1/4 In. FPI x 3/8 In. Regulator Type: Low Pressure Material: Brass Valve Inlet Diameter: 2-1/4 Valve Outlet Diameter: 3/8 Color: Silver Christmas Motif: Santa Weight: 1.75 lbs - SKU: ACHR162190 This product ships in approximately 1 days