This construction set comes with four tunnel-shaped blocks and 8 square wall pieces, all made of high quality solid beech wood. A perfect add-on to any wooden railway set. Of course you can create so much more than just tunnels with these blocks, such as buildings, garages, bus stops etc.. The Tetuan Medium Pack includes unpainted natural wall pieces as well as tunnel-shaped blocks in dark blue, grey, plum and light grey-blue.