POTACAN ROAD (GE Railcar Services Corporation) Introduced in 1961 by ACF(c) to haul sand, clay, salt, grain and bulk plastics, the Cylindrical Hopper was the first commercially successful tank-type covered hopper car design. A few of the more than 4,000 cars of this type built through 1966 can still be seen in service today across the United States. Features: See-through roof walks Blackened metal wheels Free-rolling 100-ton trucks Detailed brake gear AccuMate(c) couplers Fine painting and printing IMAGE SHOWN IS A REPRESENTATION. THE ACTUAL ROAD NUMBER IS IN THE PRODUCT DESCRIPTION. WARNING: CHOKING HAZARD - SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3.