Kai Corporation Seki Magoroku Combination Sharpening Stones for Knives with Storage Made in Black AP0334 #1000 & #4000, Case, Japan,

Size: 240 x 95 x 50 mm Materials: Combination whetstone: White alumina (#1000 & 4000), Storage case = sharpening base and lid: ABS resin (heat resistant up to 80°C), Anti-slip: Thermoplastic elastomer (heat resistant up to 80°C) Weight: 951g Country of origin: Japan Accessories: Includes storage case