This is a 2012 Shockwave. The box is 21 ft. It will fit a 50 inch side by side, it would be great for a 4 wheeler, mountain bikes, electric bikes, kids bikes, and toys. Great condition everything works. 100 gallons of fresh water, plus 6 gallon water heater. 30 gallon onboard fuel tank. 40 gallon grey tank, and 40 gallon black tank I also put 2 new 6000 lbs axels under it so you can haul as much as you want and has better clearance. The couches fold down into a king size bed along with the front queen size bed. it has a screen that rolls down to cover the back door if you want to leave it open for fresh air. Text me a reasonable offer and it could be yours.