Includes 4 x mounts each in 2 parts. 4 x M3 button screws. 4 x M3 flat screws. 4 x thicker threaded base magnets and 4 x thinner corresponding magnets. Once assembled the posts measure 20.6mm long. Magnets measure 12mm in diameter. The coloured hollow cap section fits the body posts at 5.9mm diameter The thinner magnets stick onto the shell. Glue not included. The magnets simply hold the shell in place.