1. 3M Company
2. Ceramtec GmbH
3. Coorstek Inc.
4. Elan Technology Inc.
5. Jinghui Industry Limited
6. Kyocera Corporation
7. Mantec Technical Ceramics Ltd.
8. MARUWA Co. Ltd.
9. Morgan Advanced Materials PLC
10. Murata Manufacturing Co. Ltd.
11. NGK Spark Plug Group
12. Noritake Co. Limited
13. Paul Rauschert GmbH & Co. KG
14. Precision Ferrites & Ceramics
15. Sparkler Ceramics Pvt. Ltd.