This is a set of six coasters featuring a collaboration between the Taiwanese professional baseball team Uni-Lions and the Ultraman series. The back of the coasters is cork, and they come with a well-made metal storage case. I obtained these at the Taipei Dome in Taiwan, but I'm selling them because I haven't had a chance to use them. I hope to sell them to someone who likes Taiwanese professional baseball or Ultraman. They are new and unused, but the outer box has a small scratch. Please understand this before purchasing.