Traxxas 20T 32P Heavy Duty Machined Hardened Steel 3mm Shaft RC Pinion Gear - 3950X Light Grey Part number TRX4683 makes it

Part number TRX4683 makes it straightforward to confirm you're ordering the correct component

one of the strongest aluminium alloys used in RC parts

and fasteners)

ARRMA Notorious V4 (ARA4312V4T1

which is important on smaller RC planes and gliders

Traxxas 20T 32P Heavy Duty Machined Hardened Steel 3mm Shaft RC Pinion Gear - 3950X Light Grey Part number TRX4683 makes itThe Traxxas TRX3950X is a 20 tooth, 32 pitch pinion gear machined from hardened steel and designed to fit 3mm motor shafts across a wide range of Traxxas models. This heavy duty RC pinion gear is a direct fit replacement for worn or damaged pinions, secured in place with a set screw for a solid, reliable connection. If you're running a Traxxas model and need a durable 20T 32 pitch pinion, this is the correct Traxxas part. Key Features 20 tooth, 32