Zee RD-M640-SS 10 Speed Rear Derailleur

Shadow Plus RD
Min cog: 11
Max cog: 28(DH)/36(Freeride)
For 11-23/11-28T
For single ring set-up
Total capacity: 25
Shimano Dyna-Sys 10 speed transmission
Specifications: 

Primary Color: Black
Cage: SS
RD Spring Type: Shadow Plus
RD Weight: 268g
Speed: 10
Maximum Cog: 28/36T
Minimum Cog: 11T
RD Capacity: 25T