This is an Optional 69 Tooth 48 Pitch Spur Gear for electric touring cars.   This is the main gear of the vehicle that meshes with the pinion gear.                                                                                     FEATURES: Black nylon construction.                                                              Multiple mounting holes for various applications.                                                                                                     INCLUDES: One 69T Spur Gear                                                                                                                                     REQUIRES: Nothing.  This is a direct replacement part.                                                                                                          SPECS:    Total outer diameter: 37.5mm (1.48")                                                 Thickness: 5.3mm (0.21")