FEATURES INCLUDE: Separately applied roof walks, ladder, brake wheel & brake lines Weighted, detailed underframes See-through roof walks Metal couplers and sprung die-cast trucks True scale dimensions with accurate details Accurate painting and lettering 2-rail cars feature scale wheels and body-mounted scale couplers 3-Rail trucks pre-drilled for Adjust-A-Coupler™ System (sold separately) Minimum diameter curve: O-31 (3-Rail) Minimum radius curve: 24" (2 Rail)