Keep your Mr. Heater® Portable Buddy® or Big Buddy® Heater in top operating condition with this easy-to-use fuel filter from Mr. Heater. Most commonly used with a bulk cylinder and hose assembly, this screw-in attachment filters out oil and particle contamination which could potentially cause damage to your Mr Heater unit. Manufacturer model #: F273699. Easy-to-use fuel filter keeps your Portable Buddy or Big Buddy Heater (not included) in top condition Great for use with bulk cylinder and hose assembly Filters out oil and particle contamination which could potentially cause damage Simply screws in between hose and heater