1、Made of high quality white corundum, very comfortable and durable to use 2、Double sided grindstone design, convenient and easy to sharpen knives 3、Comes with silica gel base, non-slip and safe to use 4、Ruby oilstone sintered from high temperature, has high hardness and strength 5、The white corundum is semitransparent with natural color, it's texture is very average and delicate, has high hardness and strength, hardly be abraded Features: 1. Made of high quality white corundum, very comfortable and durable to use. 2. Double sided grindstone design, convenient and easy to sharpen knives. 3. Comes with silica gel base, non-slip and safe to use. 4. Ruby oilstone sintered from high temperature, has high hardness and strength. 5. Its structure is fine and compact, has almost not easy to wear and tear the surface. 6. The white corundum is semitransparent with natural color, it's texture is very average and delicate, has high hardness and strength, hardly be abraded. Specifications: Material: White Corundum + Ruby Oilstone Base Material: Silica Gel Grit Type: 3000 Grit & 8000 Grit Size: Approx. 180 x 60 x 30mm / 7.09 x 2.36 x 1.18inch Color: 8000 Grit: Semitransparent, 3000 Grit: Rust Weight: Approx. 612g Package Include: 1 x Sharpener Stone 1 x Silica Gel Base Note: 1. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 2. Other sharpener stone and a silica gel base included, no other stuff included.