Tamiya 53423 - Aluminum Pinion Gear 46T/47T OP-423 田宮遙控車備用配件 雙星孖星  [53423]

That is a Pair of Aluminum Pinion Gears for TA-04 framework automobiles.
This is the gear that attaches toward motor.

QUALITIES: Aluminum construction

INCLUDES:

• One 46 enamel pinion gear
• One 47 tooth pinion gear
• Three 3mm set screws
• One allen key

REQUIRES: Installation onto automobile.

SPECS:

• 47 tooth gear diameter: 18.7mm (0.74")
• Pitch: 0.4 M (48P metric)

REMARKS: it will be possible that these gears may focus on other 48P cars.