This is a postcard that came as a bonus when I purchased the Idolish7 collaboration earphones at the SONY store. There are 16 types in total. I only checked the contents and then stored it in an OPP bag in a dark place. I do not sell individual cards. Idolish7, I7, IDOLiSH7, TRIGGER, Re:vale, ŹOOĻ, SONY, postcard, Riku Nanase