Mr. Heater Big Buddy 12ft Hose with Regulator - Hook your Mr. Heater Big or Tough Buddy Heater to a 20 lb. propane cylinder. The hose attaches to the quick connect fitting in your heater for ease of use. Features Includes regulator. Connects Big/Tough Buddy Heaters to 20 LB. propane cylinders. Not Compatible With Portable Buddy Heater.