The Prometheus gears from Laylax are some of the finest gears available for NGRS gearboxes. 
 
These NGRS gears are in the Standard-Torque (18:1) ratio and are ideally paired with a motor of 30-35Krpm when under 350fps.

All of the high stress areas are CNC machined from heat-treated steel and the rest is MIM (metal injection molded) from steel. 
The attention to detail is superb, these gears represent the high quality we come to expect from Laylax Japan. 
 
Please note these gears no longer come with shims.