Thetford SmartTote2 LX Portable Waste Tote Tank 40517, 4 Wheels - 18 Gallon Capacity [VERSATILITY]: Usable with any RV type, right out of the box - Rugged 18-gallon tank, fast emptying and easy to rinse [FUNCTIONALITY]: Front wheels attached to handle for maximum maneuverability [ACCESSIBILITY]: Large port opening for easy rinsing; AutoStop level gauge prevents overfilling [CONVENIENCE]: Easy to maneuver - handle hooks onto trailer hitch for easy towing [INNOVATIVE]: PermaStore compartment protects preattached hose and sewer fittings