Cylindrical hoppers are used for hauling all sorts of chemicals and other powdered products. These detailed models have all the features that make Atlas O rolling popular with modelers including:
 
- Accurate painting and lettering - Opening hatches - True 1/4" dimensions and details - Realistic see-through roof walks - Separately applied grab irons - Separately applied brake detail - Diecast articulated couplers (3-rail) - 3 Bay Minimum radius curve: O-31 (3-rail)
 
These three-bay cars come equipped with all-new diecast sprung 100-ton roller-bearing trucks with realistic rotating bearing caps. These cars operate on three-rail track and require O-31 or larger curves.