2016 Keystone Premier 22RB, Aluminum Framed Front, Rear and Side WallsAluminum Framed Slideouts2'' Thick Laminated Aluminum FloorDarco Moisture BarrierE-Z Lube AxlesAggressive Front Profile for Increased TowabilityLaminated Fiberglass Exterior Side WallsIn Frame Fresh, Grey, and Black Water Tanks1/4'' ABS Enclosed UnderbellyOne Piece TPO Roof