Note:Please choose the correct one you want ,thanks ! Description: High-quality tempered glass material, made of nanotechnology. It has a comfortable sanding feel and excellent polishing ability. The sanding effect is equivalent to 10000~12000 mesh sandpaper. The texture of the file adopts a single-grain design to ensure a smooth and smooth sanding effect. In the past, conventional files could not achieve mirror polishing, and could only rely on polishing sandpaper or polishing paste for polishing. However, the appearance of DSPIAE siren glass polishing frustration can give you the next generation of polishing and polishing experience. Wash with water without fear of rust. The packaging is double-protected and includes a special protective shell for the inner layer. Item size: SF-15:110*13*3mm MSF-13:91*13*3mm SF20:165*20*3mm Note: Siren glass polishing blade is suitable for all kinds of plastic parts and wooden parts. The polished frustration is made of tempered glass. Do not throw this product to avoid breakage and abnormal use. It is recommended to put it in a separate storage box after each use to avoid collision with other sharp objects. Please do not polish metal or the material that can be polished is not specified by the official, so as not to affect the service life of the file. If you feel that the file is weak in cutting, please clean the surface of the file to restore the cutting force. Package: 1xPrecision Glass File Knife