This is a Nambu ironware "iron egg". ■2 pieces How about using it to supplement iron? I think it's easier to use than the egg shape because it doesn't roll. ■Sold individually is okay. Size: Approx. 7cm x 5cm Weight: Approx. 190g Manufacturer ■Iwate, Oshu Mizusawa This is a town famous for Nambu ironware. ■I use it for simmering beans, etc., and black beans, etc., come out with a very beautiful color. Thank you to those who understand the above.