Nema G11 Glass Reinforced Epoxy 

 

G11 Glass Reinforced Epoxy - natural (yellow green to amber) Technical Data Sheet
This grade is similar to G10/FR4, with the addition of a higher operating temperature and some improved mechanical strength at elevated temperatures.
NEMA G-11 certs to MIL-I-24768/3 GEB, IEC 60893-3 Type 2 EP GC 203; FR5 certifies to Mil-I-24768/28 GEB-F