Natural Whetstone Iyo Me-to Tora (Tiger) Size: Approximately 198 x 59 x 20 mm Weight: Approximately 718g Medium Grit Product of Tobe, Ehime Prefecture Due to the nature of natural whetstones, compatibility may vary depending on the material and steel type of the blade. Being a natural product, it may crack due to temperature differences, humidity, or impact. After use, thoroughly remove moisture and store it wrapped in a cloth such as a towel or hand towel in a place without humidity. Please avoid storing it in places where it may get wet or where there are sudden temperature changes (e.g., outdoors where frost may occur).