A Deore XT front derailleur. Some of the worming / water damage that these XT front derailleurs all seem to suffer.
Shimano Deore LX Front Derailleur FD-M571 Top Pull Down Swing 3x9 speed
Shimano Deore XT Front Derailleur 34.9 M739 Top Pull
Shimano Deore XT Front Derailleur 31.8mm M739 Top Pull
Shimano Deore XT Front Derailleur FD-M735 31.8mm Front Derailleur Bottom Top Pull
Shimano Deore XT Front Derailleur FD-M770 Triple Top Pull / Top Swing 34.9mm 9 speed
