MTH: 40-1137 MTH RailKing 8 Piece Elevated Subway Trestle Set for use with Lionel FasTrack Trestle set only - no track included O Gauge The RealTrax line is now complete with the addition of the RealTrax Elevated and Graduated Trestle Systems. The 24-piece RealTrax Graduated Trestle consists of 12 pairs of piers, pier bases and track holders - each different in height to create a 4.7% grade that rises to 6 1/2 inches above a crossing track section below. The 8-piece Elevated Trestle Set (NOT INCLUDED) consists of 8 trestle piers of the same height, so that you can maintain the maximum height reached by the 24-piece system for a longer distance. Each RealTrax section simply slides into the track holder. No track mounting screws are necessary to attach track to the piers. Now you can safely add vertically to your RealTrax layout with stability, quality, and reliability. The RealTrax Trestle System includes graduated and elevated trestles that are compatible with Lionel FasTrack. Almost all O-gauge model railroaders may enjoy the realism, flexibility and simplicity of its design. Features: 8x same sized pier sections Accepts Lionel FasTrack Durable ABS Construction 6 1/2" height Simple snap together Assembly DOES NOT INCLUDE TRACK