Team Associated brand Diff and Idler Gears includes 1 Diff and Idler Gears #91466 contents: qty 1 Gear Diff (52T 48P) qty 1 Gear Diff Cover qty 1 Idler Gear (31T 48P) You will need part number #4675 screws to attach the diff gear cover to the gear diff housing. This item fits the following: ProSC10 Reflex DB10 Trophy Rat This part fits the following other parts: #91461 - Gear Diff Kit