45l / 11.9 gal capacity. Made of food grade polyethylene and is BPA free. Water tank and hose kit include brass pipe fittings. Includes brackets necessary to mount the tank at the sides of the Slimline II Roof Rack. In order to mount the tank away from the sides either perpendicular or parallel to the rack slats, 45l Water Tank Optional Mounting Brackets - by Front Runner are needed. Sold Separately.