Quanzhou Fengze Donghai Hardness Block Factory is a professional manufacturer of various standard hardness blocks, standard hardness testers and other measuring instruments. With a history for 36 years, we own strong technical force, strength in new product R & D and mass productivity, and has dealers in the United States and Germany. Our products passed the ISO 9001: 2008 quality management system certification in 2013, with standard hardness test blocks as core technology. Diamond standard hardness blocks and other measuring products produced by our factory are complete in variety, excellent in quality, stable in performance and superior in technical performance to international standards.

Diamond Brinell, Rockwell, Vickers and Knoop standard hardness blocks and other measuring products can meet the requirements of ISO 6506-3, ISO 6508-3, ISO 6507-3, ISO 4545-3, other international standards and different national standards. The technical indexes of uniformity and stability of various standard hardness blocks fully conform to the provisions of the national metrological verification regulations.