The highest quality spheres are back by popular demand. Zen Magnets are small but impressively strong rare earth super-magnets, 5mm in diameter, best in class. 216 seems to be just the right number of them, such simple geometric salience comes no sweeter than six cubed. The Zen set is the perfect balance between portability and potential, between manageability and latent intricacy. Each magnet is strong enough to support the weight of the whole set.