Package ListIf you have any questions, please . Please rest assured, we provide perfect after-sales service. Package List1 PC 2 Stage Auto Changeover RV LP Propane Regulator + 1*Valve brackets and screws + 1 * Roll Sealing TapeEnhanced upgrades 2-Stage Auto Changeover Gas RegulatorThis 2-Stage RV Propane Regulator Allows You to Hook Up 2 Propane Tanks and Automatically Switches From the Primary to The Reserve tank when the Primary is Empty And The Indicator lights change color to Let You Know When a Tank Runs Out of Propane and Needs to Be Refilled, for Refilling Without Interrupting the Propane Supply The Regulator Ensures that Propane Gas is Always at The Right Pressure, Provides Efficient and Stable PerformanceHigh QualityThis 2-Stage Auto Changeover LP Propane Gas Regulator Manufactured from one-piece cast aluminum alloy with brass Connections. Weather Resistance, Anti-aging, Air Tightness, Heat-resistance, and Flexibility Features. NOTE: (This 2 Stage Automatic conversion LP Propane Regulator Inlets Suitable for 1/4" SAE Inverted Flare RV Pigtail Propane Hoses ,Not 1/4" Male NPT Propane Hoses ) , Double-stage design maintains constant gas pressure under changing demand and conditionWide ApplicationThe 2-Stage Automatic Conversion LP Propane Regulator is The Solution to Maintaining a Safe and Reliable Propane Gas Supply for Your RV, Camper or Other Propane-powered Equipment. Suitable for RV with Dual Propane Tanks. For RV/Camper/Travel Trailer... Perfect Replace any existing Automatic Changeover Regulator on Your Current RV, Travel Trailer, Camper, Maintains Constant an Continuous Gas.Specification & parameters2-Stage RV Propane Regulator: Master Cylinder Capacity 210,000BTU/Hour; Reserve Cylinder 130,000BTU/Hour, Double Stage Design Maintains Constant Gas Inlets are 1/4"SAE Inverted Flare, Outlet is 3/8 "NPT Female Pipe Thread. 2-Stage Regulator and Propane Hose All Fitting Connectors Made of 100% Solid Brass and with CSA Certification, This Regulating Valve is Durable and Corrosion Resistant, Making it Ideal for Use in Outdoor Environments.