42L/11.1 gal capacity. Made of food grade polyethylene and is BPA free. 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, 42l Water Tank Optional Mounting Brackets – by Front Runner are needed. Sold Separately.A Premium Water Tank Hose Kit – by Front Runner, sold separately, is available for this water tank.To mount this 42L Water Tank to an original Slimline Roof Rack, the 42l Water Tank Optional Mounting Brackets – by Front Runner are needed. Sold Separately.