1. 3M Company
2. Airgas Inc. by Air Liquide S.A.
3. ALLIED HIGH TECH PRODUCTS Inc.
4. ARC ABRASIVES Inc.
5. August R?ggeberg GmbH & Co. KG
6. Camel Grinding Wheels Works Sarid Ltd.
7. Compagnie de Saint-Gobain S.A
8. Dragon Abrasives Group Limited
9. FACO Abrasive Industrial Sdn. Bhd
10. Henan Ruishi Renewable Resources Group Co. Ltd.
11. Henan Sicheng Abrasives Tech Co. Ltd.
12. Hermes Schleifwerkzeuge GmbH & Co. KG
13. Imerys S.A.
14. K.A Refractories Co.Ltd
15. NORITAKE CO. Limited
16. Osborn GmbH
17. SAIT ABRASIVI S.p.A.
18. Shandong Renwa Abrasive Tech. Co.Ltd
19. SIA Abrasives Industries AG
20. Vizag Chemical
21. VSM ? Vereinigte Schmirgel- und Maschinen-Fabriken AG
22. WEILER Abrasives d.o.o.
23. Zhejiang SALI AbrasiveTechnology CO. Ltd