18cm Triangle As shown in the photos. The instrument itself has no damage, but you may want to clean the metal yourself to restore its shine. There are no distortions or scratches, so the sound is not affected. I bought it new for a concert, used it a few times for practice and once for the actual performance, and then stored it in a dark place. Please note that the case has aged. The price is set lower than on various online shopping sites, Yodobashi, Rakuten, etc.