Shimano RD-M593 Guide Tension Pulley Set Rear Derailleur Spare. Genuine Shimano replacement part for use with Shimano Deore RD-M593 10 speed rear derailleurs.
Also compatible with the following rear derailleurs:
- Shimano Deore RD-M615-GS/SGS
- Shimano Deore RD-M610-GS/SGS
- Shimano Zee RD-M640-GS