Hot Racing Revo 3.3 Heavy Duty Mod 1 Steel Spur Gear. 

Features:

• CNC machined and lightened hardened steel construction
• Upgrades factory plastic gear
• Super heavy duty 1.0 Mod pitch
• Black oxide coating for durability and corrosion resistance
• Purple anodized countersunk washers

Specifications:
Number of teeth: 42
Gear pitch: 1.0 module
Mounting holes: 3
Tooth face width: 6mm

Includes:

• 42 tooth 1.0 Mod spur gear
• (3) mounting screws
• (3) washers
• (3) red anodized countersunk washers

NOTE: Use with hardened clutch bell