G330 : Fine Grain
Isotropic, low density, high resistance graphite.

G347 : Fine Grain
Isotropic, medium density, general grade graphite.

G348 : Extra Fine Grain
Isotropic, high density, low resistance, high strength graphite.

G458 : Extra Fine Grain
Isotropic, medium density, very low resistance graphite.

G467 : Supa Fine Grain
Isotropic, low density, low resistance graphite.

G520 : Supa Fine Grain
Isotropic, medium density, high strength graphite.

G530 : Ultra Fine Grain
Isotropic, medium density, high resistance graphite.

G535 : Ultra Fine Grain
Isotropic, medium density, very high resistance graphite.