Spec-R M-05/06 HD gear differential set
New from Spec-R comes a heavy duty gear differential set of the Tamiya M-05 and M-06 kits. Using a lightweight yet sturdy plastic diff housing, nylon gears and longlife differential joints the diff requires less maintenance compared to the kit part while offering improved diff action at the same time. It also will be more consistent during a run even when using higher power motors. The diff comes without the needed fluid and it is only usable with 10x15x4mm bearings.
Source: Spec-R [spec-r.com]