The MTH 30-70148 CSX Airslide Hopper 3 Pack is a ready-to-go pre-built model train hopper car set in O gauge scale. Made of plastic and diecast materials, this set features a white color scheme with the corporate roadname of CSX Transportation. Perfect for model railroading enthusiasts aged 17 years and up, this set comes in a C-10 Mint-Brand New condition and is compatible with a three-rail system. The set includes three hopper cars, making it a great addition to any railroad layout.