1. 3M Company
2. BNZ Materials Inc.
3. CeramTec GmbH
4. Dyson Technical Ceramics Ltd.
5. Etex Group
6. FibreCast Inc.
7. Ibiden Co. Ltd.
8. Isolite Insulating Products Co. Ltd.
9. Luyang Energy-saving Materials Co. Ltd.
10. Mitsubishi Chemical Corporation
11. Morgan Advanced Materials plc
12. Rath-Group
13. RHI Magnesita GmbH
14. Unifrax
15. YESO INSULATING PRODUCTS COMPANY LIMITED