This is the Hot Racing aluminum rear hub set for the 1/10 4S BLX Arrma 4X4 vehicles.
Features:
Made from CNC machined 6061-T6 aluminum, anodized black
Stronger and more durable then the plastic caster blocks
Laser etched lettering
Replaces factory stock plastic rear hub
Known to fit part numbers ARA102690 and ARA102692