This is the optional Team Integy 15T Pinion Gear for 1M/5mm Shafts.
FEATURES: Steel construction, black in color
Replaces worn or damaged pinion gear
INCLUDES: One 15T pinion gear
One 4x4mm set screw
SPECS: Diameter: 0.59" (15mm)
Height: 0.49" (12.5mm)