MINI60703CXT Mini 6XT eXothermal Technology 6 Litre 12v 300W & 240V 700W Twin Element Water Heater (151 ratings) 100% Copper 6 Litre Leisure Vehicle Boiler / Camper Caravan Motorhome Marine £299.95 Quantity: at £299.95 each Add To Basket 3 in stock.