Atlas HO 20007174 ACF 3-Bay Cylindrical Hopper, CEMEX Mexico #62152Atlas HO 20007174 ACF 3 Bay Cylindrical Hopper, CEMEX Mexico #62152 This Atlas Master HO Scale ACF 3 Bay Cylindrical Hopper is based on cars introduced by ACF in 1961 and built through 1966. These cars were the first commercially successful tank type covered hopper design and served industries hauling grain, sand, clay, plastics, salt and more. These models feature accurate details, 100 ton trucks with free rolling wheelsets, fine paint, crisp