Identity Discs (or Light Discs) are the most fundamental piece of equipment to programs in both the Game Grid and in the Tron system. They contain all that a program is, in the form of a detachable glowing disc normally worn on the upper back. Everything seen, heard, or otherwise experienced is recorded on the wearer’s disc.Model dimensions:- diameter – 254 mm- thickness – 30 mmDesigned in Solid Works 2012, rendered in Keyshot 5.0.99.Useful links:http://tron.wikia.com/wiki/Identity_Dischttp://herocomplex.latimes.com/movies/tron-legacy-identity-discs-explained-no-theyre-not-just-frisbees/https://www.youtube.com/watch?v=a2H6TRdHF_shttps://www.youtube.com/watch?v=6GCbSd1PXxM