Warm until the very end! Lasts for 12 hours Individual package capacity: 10 pieces Maximum temperature: 69℃ Average temperature: 50℃ Size: 9cm x 5.5cm Duration: 12 hours Ingredients: Iron powder, water, activated carbon, absorbent resin, vermiculite, salts Retail price: 589 yen per piece Expiration date: April 2029 *Please only purchase if you understand that this item has been stored at home. Also, as this item is listed on other flea market apps, please message me before purchasing.