HO Maxi-III Well Cars in DTTX livery are HO-scale double-stack intermodal freight cars designed to carry two shipping containers per car, using a recessed well between the trucks to keep the containers low and stable on the rails.

They ride on 33-inch and 38-inch solid nickel-silver wheels with RP25 contours for reliable tracking, are weighted for smooth operation, and use body-mounted McHenry operating scale upper and lower shelf knuckle couplers for authentic handling. The highly detailed injection-molded bodies are painted and printed for realistic decoration, and the design is suited to HO layouts with a minimum 18-inch curve radius, making them a realistic addition to intermodal scenes.