This is the Golden Horizons 32 Pitch 12 Tooth Pinion Gear. FEATURES: For use with 1/10 scale vehicles using brushless motors with 3mm shafts Hardened steel construction INCLUDES: Golden Horizons 32 Pitch 12 Tooth Pinion Gear REQUIRES: Fastening to motor shaft (note set screw not included, reuse original set screw) SPECS: Number of Teeth: 12 Pitch: 32 Height: 0.56" (14.2mm) Hole Diameter: 0.12" (3.17mm) Golden HorizonsPart GHH01274