We're happy to present something everyone has been waiting for - a combination ceramic/ceramic whetstone that will handle your finest sharpening needs. The CC4 whetstone consists of a super fine ceramic stone (white side) (0,1 micron) and a ceramic stone, made of synthetic sapphires (dark grey) (1 micron). You don't need any lubrication for these stones but now and then you should consider cleaning them with water and liquid soap. A leather pouch is included.