Shimano Alivio RD-M410 Rear Derailleur Pulley Set Description: The Shimano Alivio RD-M410 Rear Derailleur Pulley Set is a factory replacement set that consists of a tension and a guide pulley. Both of these pulleys feature 13 teeth and a plastic body that reduces the noise of the chain going through the derailleur. Features: Includes the guide and tension pulleys, covers, and the low maintenance bushings that the pulley wheels roll on Guide Pulley Bolts and other hardware sold separately Compatible with Shimano Alivio RD-M410 7/8 speed rear derailleurs