The Mr. Heater Refillable 1LB Tank allows you to refill, reuse and save money. Easy to use and helps reduce waste. Tank ships empty and requires the included refill kit. The Mr. Heater 1LB Refill Tank Kit comes with 3 tank feet and the tap refill valve assembly. The tank feet attach to the safety collar of any standard 20 lb tank for the refill process or can be attached to the bottom of the tank for increased stability when not in use. The tap refill valve assembly connects 1-lb refillable tank to 20-lb propane tank. With the valve assembly there are no small tools to lose or no small parts to strip out or damage.