??This is 80 tooth 48 pitch spur gear for RC racing car. It is the main gear of the vehicle and it meshes with the pinion gear.

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

Specification:
Pitch: 48P
Teeth: 80T
Outer diameter: 43.39mm
Thickness: 4.34mm
Material: Plastic
Weight: 5.2g/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: 15.3g / 0.53oz

Package list:
2 * 48P 80T Spur Motor Gear