Material: White Corundum. Product name: red and white suit, green and white suit. Product size: 215*95*23mm. Product specifications: 3000/8000. 3000/8000 green and white double-sided white corundum whetstone. Function: used for kitchen knife sharpening. 5-piece set (whetstone + bamboo base + correction stone + silicone pad + knife holder locator)