For Sale: 5th Wheels / Muskegon, Mi Description: The 2012 Infinity 3870fk Is A Fifth Wheel That Has Five Slides And A Front Kitchen. The Rear Of This Model Has King Bed. A Rear Bathroom With A Shower, Sink And Toilet Lead Into The Central Living Area That Holds Two Recliners And A Large Sofa. The Front Kitchen Consists Of A Refrigerator, Double Sink, An Island Counter, Stove, Microwave And A Dinette. Features: Ac Specifications: