Speks stripes – 512 2.5mm magnet balls Mash speks for stress relief – speks are like a magnetic putty, without the mess! Due to their 2.5mm size and low flux rating these mini magnets mash around and are oddly satisfying to touch. Build for focus – need a moment of zen? Build hundreds of super cool geometric shapes with speks! From the cube to the buckyball, speksed is your go to resource for step-by-step instructions on building with magnet balls.