MR. HEATER Horizontal Garage Heater Vent Kit (7-Piece) F102860 MR. HEATER
A nice touch is that the MR. HEATER kit comes with a handy conversion chart inside the package.
MR. HEATER 6 Ft. X 3/8 In. FPT x 3/8 In. Propane Hose Assembly F271149-72
People who own an MR. HEATER conversion kit often mention how reliable it is over time.