This is a high-quality Archer replacement spur sprocket. This is a 7-tooth .325 pitch sprocket and it comes with a needle bearing.  The sprocket fits the following chainsaw models: Echo CS-370ES, CS-420ES, CS-4510 

Replaces Echo OEM numbers A556000480 & A556000481 

Archer Chainsaw accessories are made with quality and sold all over the world!