2018 Keystone Carbon 347fuel: diesel rv type: toy hauler size / dimensions: 38 ft transmission: other Selling our 2018 Keystone Carbon 347, fifth wheel Toy Hauler, going a different route. Carbon, has all aluminum framing, with fiberglass sidewall construction, it has a 12 foot 6 three season garage, big enough for toys (4-seater RZR) to fit easily, garage has, beds, TV couches, and screened in, plus party deck & screen. dual A/C units, three slides, side and rear power retractable awnings, the unit has a 5500 kw onan generator, with a 30-gallon fuel tank, and pump to fill the toys. 55" television, leather reclining sofa with heat and massage in main living area. Dual propane tanks, and hydraulic auto leveling jacks. Non-smokers.