Diabolo/Triabolo 2nd stage HEAT TREATED PINION replaces D004. Can ONLY used with D182(10mm) or D274(12mm) HEAT TREADED METAL gear.
The wheels must be lubricated frequently with one drop of silicone oil.
MAXIMUM HEAD SPEED FOR THESE GEARS IS 2300 RPM. MUST HAVE D191 INSTALLED WHEN USING THESE GEARS
