Double the power and double the security: the Coleman Gemini Propane Carrier is an innovative, convenient way to connect two propane tanks sold separately at once to your stove, grill, heater, or other propane powered appliance. Just screw two fuel tanks into the Gemini Carrier, and then connect your appliance to the Carrier. Never be caught with an empty tank again. Unique alternative to a 20 lb. tank. Two 16.4 oz bottles of propane not included screw into compact case for 42,000 BTUs of combined power Will run average grill 30 minutes to an hour if 20 lb. tank runs dry. Will run Coleman RoadTrip grills up to 2 hours on high. Use with other Coleman propane products stoves, heaters and more. Top handle for easy transport.