From FrontRunner - This water tank has cutouts that fit over the wheel arches on the inside of most wagons or in the tray of most double cab utility vehicles. The tank is easily secured through the round securing cutouts by using either ratchet straps or metal straps (not included) to tie it down. The fact that it is of such aslim design reduces the water sloshing noise and allows it to utilise space that would usually go to waste. 41l capacity. Made from food grade polyethylene and is BPA free. This tank has plastic pipe fittings. TheWater Tank Hose Kit - by Front Runnerfor this water tank is sold seperately.