This is the optional aluminum center pulley for the Tamiya TA04 chassis equipped with the center one-way unit.
This part fits onto the spur gear shaft.

FEATURES:

Durable aluminum construction
Natural color

INCLUDES:

One center pulley
Three 3mm grub screws (set screws)
One hex wrench (allen key)

REQUIRES: Assembly onto TA04 chassis

SPECS:

Total outer diameter: 18mm (0.71")
Pulley tooth diameter: 13.6mm (0.53")
Total height: 13mm (0.51")
Pulley only height: 7.5mm (0.29")

COMMENTS:

This is the same pulley as the one used on the TRF414
Per Tamiya: Keep out of reach of small children. Children must not
be allowed to put any part or packaging material in the kit in
their mouths.