Fallkniven Ceramic Whetstone Sharpener with Leather Pouch. The CC4 whetstone consists of a super fine ceramic stone (white side) (01 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. Specifications for Fallkniven CC4 Ceramic Whetstone Sharpener w/Leather Pouch: Manufacturer: Fallkniven Fabric/Material: Leather Overall Length: 4 in Blade Material: Stone Features of Fallkniven CC4 Ceramic Whetstone Sharpener w/Leather Pouch: Ceramic Whetstone White Side: Super Fine Ceramic Stone Dark Gray: Made of Synthetic Sapphires No lubrication needed Leather Pouch Included Dimensions: 32 x 100 mm Package Contents: Fallkniven CC4 Ceramic Whetstone Sharpener w/Leather Pouch Fallkniven CC4: CC4 Ceramic Whetstone Sharpener with Leather Pouch