This is 98 tooth 64 pitch spur gear for RC racing car. This is the main gear of the vehicle and it meshes with the pinion gear.

Features:
100% brand new.
Made from high quality plastic.
Thin lightened and profiled for performance and durability.
Easy to install.

Specification:
Pitch: 64P
Teeth: 98T
Outer diameter: 39.69mm
Thickness: 4.23mm
Material: Plastic
Weight: 4.7g/1pcs
Quantity: 2pcs

Note: there's some little error from human measuring.

Package size: 9 * 6 * 2cm / 3.5 * 2.4 * 0.8in
Package weight: 14g / 0.5oz

Package list:
2 * 64P 98T Spur Motor Gear