Bigjigs Rail BJT113 Ascender/Descender Children can use the Bigjigs Rail Ascender/Descender Pack to extend their wooden railway systems in many creative ways Made from high quality, responsibly sourced rubber wood, this set is a wonderful addition to any wooden railway system 4-piece set, approximately 9 inches long Most wooden railway sets are compatible with Bigjigs Rail, making Bigjigs the perfect choice for starting or extending your collection Bigjigs Rail is suitable for children ages 3 and over, and conforms to ASTM and CPSIA safety standards