SPEKS Spectrum2. 5mm magnet balls. Made from rare earth magnets, Speks magnetic balls are the most fun stress relief desk toy around. Speks Spectrum is a deep, jewel toned rainbow. Product Features Perfectly crafted miniature magnets meticulously designed for maximum fun. If you're in need of a desktop distraction, an office status symbol or somewhere to store your nervous energy; Speks are for you.