The MAGNALINX MED+RAP is comprised of 60 individual magnets.  It can be adjusted to fit any size wrist up to 9 1/2" by just removing individual magnets.  The individual magnets are 10mm (.4 inches) in height and have a power rating 6,000 Gauss (gauss is how you measure a magnets strength) each.  The GUNMETAL finish offered above is one of our most popular designs for men, teens or anyone with a military background.  If you're looking to create your own designs, we think it looks best when combined with SILVER or BLACK MED+RAP finishes.