Brand new, unused. This is a double-sided whetstone with grits of #1000 and #4000. Product Details: https://store.kai-group.com/shop/g/g13811/ Size: Approximately width 24 x depth 9.5 x height 5 (cm) Weight: Approximately 901g Contents: 1 piece Included: Storage case Material: Combination whetstone: White alumina (#1000 & 4000) Grinding base/lid: ABS resin Made in Japan Heat resistance by part - Product Name: Whetstone - Color: Black - Material: Ceramic - Size: 1000 - Application: For sharpening knives