Thetford SmartTote2 Portable RV Waste Tote Tank 40501, 2 Wheels - 18 Gallon Capacity VERSATILITY:Usable with any RV type, right out of the box DESIGN: Rugged 18-gallon tank, easy to use and fast emptying FUNCTIONALITY: Retainer strap holds the heavy-duty sewer hose in place ACCESSIBILITY: AutoStop level gauge prevents overfilling and improves venting CONVENIENCE: Easy to maneuver - optional tow strap hooks the tote to the RV or car