The material has high hardness and good wear resistance. Its service life is 4-5 times that of steel gauge blocks. It is the material with the longest service life and the longest calibration time interval currently used in measuring instruments. Good corrosion resistance, general chemical reagents will not damage it, can be used with bare hands, no need for anti-rust treatment. The grinding block can be placed for a long time, no special treatment is required during use and storage. The material has good stability and the annual change is very small, so the calibration period can be appropriately extended. Fine material, smooth surface, strong grinding force and high grinding accuracy. The linear expansion coefficient is similar to that of commonly used steel materials, and can replace metal gauge blocks. When measuring the length of steel products, no temperature correction is required. Non-magnetic, non-conductive, It can be used in special occasions., Manufacturer: CFWWSAQ