Brand new 1/87 (HO) scale plastic model of Lowboy Tri-Axle Booster with Integrated Rear Axle (2 Sets) plastic model by Promotex. Brand new box. True-to-scale detail. Officially licensed product. Some simple assembly is required. This set includes 4 wheel sets, and booster. Manufacturer's original unopened packaging. Booster dimensions approximately L-3 inches long. Diameter of each wheel is approximately 0.5 inches.