This is a replacement Arrma 50 Tooth Center Differential Set.

Features:

• Super-tough steel Crown, Planetary and Satellite Gears for long-lasting durability in all conditions
  
• Super-strong Diff Case for increased durability under extreme loads
  
• Precision manufactured screw threads for fast and easy servicing
  
• Precision manufactured Gear Teeth for consistent performance at high speeds
  
• Specially designed Diff Case Insert for increased strength and durability
  
• Metal Cross Shafts for increased efficiency of fit and long-lasting durability

Includes:

• (1) 50T Spur Gear
• (1) Differential Case
• (1) Diff Case Insert
• (4) 10T Satellite Gears
• (2) Metal Cross Shafts
• (2) Planetary Gears
• (2) F/R Diff Outdrives
• (2) Diff Pin - 2.25 x 9.8mm
• (2) Silicone O-rings
• (1) Diff Gasket
• (4) Satellite Gear Shims
• (4) Metal Cross Shaft Insert
• (1) 43T Straight Diff Crown Gear
• (4) Button Head Screws M3 x 12mm
• (1) Set Screw M4 x 3mm