Seems to be a 60 ft Hanna-Sherman Metro Wash tunnel, that was introduced in the second half of the 1990's. It consists of a Stainless Steel/Image Arch, HSS-2 Mitter, TW-96 Tire Washer, Hub-Cap Rocker Panel Brushes (probably 28"), a pair of 63" Wrap Arounds, an Econo Arch followed by another Stainless Steel/Image Arch and the Concorde Dryer Equipment.