3B-THE FIBREGLASS CO.
3M
AGY
ASAHI GLASS CO.
CARDINAL GLASS INDUSTRIES
CORNING
Cospheric
Gerresheimer
GUARDIAN INDUSTRIES
Hartford Technologies
Hilgenberg
Mo-Sci
Nippon Electric Glass
NIPPON SHEET GLASS
Nittobo
SAINT-GOBAIN
SCHOTT
Stikloporas
Vitro
Zhejiang Dehe Insulation Technology