Three crown gears, offset 1mm. 1 each 15- 17 - 19 teeth, for 3/32" axle, on sprue.
2 holes for grub screws are provided but not tapped.
Includes 4 6-tooth pinions, which require cutting off and boring out to 1.5mm to fit motor shaft.
Recommended materials: aluminum, brass, bronze, metallic plastic
Untested materials: Hi-Def Cyano-acrylate, others. Strong-and-flaxible does not provie enough precision.