Fiber whetstone (commonly known as ultra-fine stone) is a combination of high- ceramic fiber and thermoplastic resin, with high hardness, wear resistance and not easy to break.In addition to hand- grinding, it is suitable for pneumatic and electric reciprocating grinding machines. It is the perfect ultrasonic vibration machine.Ceramic fiber whetstone can grind molds of many different materials. suitable for generally difficult grinding, such as narrow groove walls, grooves, holes, scratches, ribs and . Particularly suitable for quick removal of hardened surfaces of molds after .Grinding can water or oil as an abrasive.Granularity: P220, P320, P400, P600, P800, P1000, P1200220 and 320 are used to remove the hardened surface of the mold after and mechanical rough cutting.400 , 600 are used to remove fine machining marks and general grinding.800 , 1000 , 1200 are used for fine grinding or polishing before mirror processing.Colour:random color(The specified color is not accepted)Material:Alumina Fiber WhetstonePackage Contents:7 * Fiber Whetstone 1 * bracketOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.