Individual Siegetek gears. 

G1T1R1: Single sector gear compatible with V2/3 Revolution, V2/3 Revolution Plus and V6/7 Revolution gear sets. Tooth count 16/31

G1T2R1: Single sector gear compatible with V2/3 Balanced, V6/7 Balanced and V6/7 Torque gear sets. Tooth count 16/32

G2T1R1: Step gear compatible with V2/3 Revolution single and dual sector gear sets. Tooth count 21/35

G2T1R2: Step gear compatible with V2/3 Balanced single and dual sector gear sets. Tooth count 20/39

G3T1R1: Bevel gear compatible with V2/3 Revolution single and dual sector gear sets, V6/7 single and dual sector gear sets. Tooth Count 11/30

G3T1R2: Bevel gear compatible with V2/3 Balanced single and dual sector gear sets, V6/7 Torque gear sets and Balanced Shoot and Recoil Engine gear sets.

G1T3R1: Cyclone Dual Sector Gear