The Yamba Wave-Up 2 Adapter Set brings even more variety and excitement to any wooden railway track. With its cleverly designed ramps and curved elements, you can create thrilling ascents and descents that make every train ride a special experience. All parts are compatible with common wooden railway tracks and building blocks, making the set perfect for integrating into existing play worlds. Contents of the Wave-Up 2 Adapter Set: 17 Adapter Links, 2 Adapter Bars, 1 Cross Intersection, 2 Wave Wooden Tracks.