This is the Robinson Racing Hardened 45 Tooth 48 Pitch Pinion Gear. FEATURES: Constructed of hardened machined steel
May be used on motors with a 5mm shaft including, Associated
and HPI models INCLUDES: 45 Tooth 48 Pitch Pinion Gear with 4mm Set Screw REQUIRES: 2mm hex wrench, GPMR8011 SPECS: Number of Teeth: 45
Pitch: 48
Hole Diameter: 5mm
Outer Diameter: 0.90" (23mm)