G4 and G5 are Fujitsu 2732s.
B3, B4, B5, D4, D5, D6 are Hitachi 2532s.

G4 - 1800 G
G5 - 1900 H

B3 - 1200 A
B4 - 1300 B
B5 - 1400 C

D4 - 1500 D
D5 - 1600 E
D6 - 1700 F
