MIFAB® FD240 Series lacquered ductile iron area drain with 1/2" (13) thick, 6 1/2" (165) diameter heavy duty ductile iron grate with stainless steel screws. Recommended for use in vehicular traffic areas. MIFAB® Series FD240 lacquered ductile iron area drain with 1/2" (13) thick, 6 1/2" (165) diameter heavy duty ductile iron grate with stainless steel screws. Recommended for use in vehicular traffic areas.