Toilet mount pan, 11.5 gallon holding tank, 3″ ABS drain bolted onto tank, vent is drilled, molded-in sleeve. Price includes 15 year warranty. Please check dimensions before ordering. Originally fit a Transvan motorhome and possibly Casita travel trailers, but may fit many other makes and models. Perfect for van conversions and skoolies. Also see #1193 for different dimensions.