Shapemags Magnetic Tiles Building Set - Includes 4 Freestanding Arches, Made with Power+Magnets Set Includes 4 1/4 Freestanding Arches in Red, Blue, Yellow and Green Easy Addition to any Magnetic Tiles Set! Build Arched Roofs, Tunnels, Dome Structures and more New and Improved Arch Design Makes Arches Stay in Place Now Built with Power+Magnets! 3 X Stronger than other Magnetic Tiles Brands! Great for Building that will Last! Packaged in a Beautifully Designed Box. Makes a Perfect Gift! Safety Tested According to American Guidelines