This item uses O-Ise-san, the purifying salt from Ise Jingu Shrine, known for Amaterasu Omikami. Uses natural stone. Size: 4.5 x 2.5 cm You can place it in your kamidana (Shinto altar), entryway, or any place you like. It is made of high-density, hard-type resin. You can purify it with running water. The effect is expected to last for about a year. The dish is not included.