#420 Chain master link for 50cc 70cc 90cc 110cc 125cc Dirt Bike Pit ATV, Mini Bike, Scooter, Quad, etc. 420 drive chain master link Specifications: No: 420; Pitch: 1/2″; Roller Width: 1/4″; Roller Diameter: 5/16″; Sprocket Thickness: 0.227″. 420 Master Link Premium Quality: Made of alloy steel, heavy duty and long durabiltiy. Gold 1 PC 420 Master Connector Uses a special steel alloy designed to protect against heat cracking in cold weather due to severe heating and cooling during competition. #420 Chain master link 4 PC ,420 drive chain master link Gold 1 PC- #420 Chain master link 4 PC ,420 drive chain master link Gold 1 PC-420 Master Connector for Dirt Bike Pit ATV Quad Buggy- 420 connecting link BY Epromiseparts