For Sale: 5th Wheels / Thornburg, Va America's Number One Selling Fifth Wheel With The Top Selling Floor Plan. This Unit Is Loaded With Additional Upgrades Like A King Bed, Washer Dryer, And A Generator! Over 400 Square Feet Of Living Space! Four Seasons Luxury High Line Unit! Model: M-3400 Rl Length X Width: 38' X 8' Axles: 2 Weight: 12700 Self-contained: Yes Slides: 4