20L / 5.2 gal capacity Made of food-grade polyethylene and is BPA-free. Rack mounting bracket and lockable tap included. Includes the brackets necessary to mount the tank to your Roof Rack. The mounting bracket features a tap and latch with safety catch. Both are lockable with the Front Runner RRAC134 (sold separately). The tank has 1/2'' (BSP thread) polyethylene fitting for the supplied tap or any other 1/2'' fitting.