This is a Traxxas M0.8P, 50T Spur Gear. 6842
FEATURES: M0.8 pitch 50 tooth Black plastic construction Compatible with 32P pinion gears
INCLUDES: One M0.8P, 50T Spur Gear
SPECS: Pitch: M0.8 Tooth: 50 Outer Diameter: 41.5mm (1.63″) Inner Diameter: 11mm (0.43″)