JAG Hobby Gears, Black and Orange, Orange gears are firmer for Polymer and Drag Cars, or if you just tend to bounce off the walls alot.
Black is 7 Tooth Only
Orange comes in 7 and 8 Tooth
Black gears are softer and usually provide slightly smoother mesh due to softness but teeth will roll slightly easier.
These gears mesh best with the RPMS Hyper Rev Gears