This listing is for the puchase of a 3D printer CAD STL file to create your own braille alphabet strips. The design has a cut off top right corner for orientation purposes, and a keyring circle cut out on the top left. 
 
This product was designed for a nonverbal blind pupil who learnt to communicate by tapping braille letters to spell out words. The design was produced so they could wear the item on a lanyard around their neck, providing them with a voice at all times.