Roto-molded, one piece construction for ultimate durability. (Optional) 3 hookup fittings and 1 fill fitting preinstalled (on the front face of the diagram) for convenience of use in any orientation. 65 x 22 x 9, 51 Gal. - Tank Only or with three corner placement fittings in 1/2" and one 1 1/4" filler boss.