Teeth Type：42 Teeth
Fully Milling Machined From AL7075 T6
16 Teeth：Hardened steel.
Anodized
Colors Available：Black, Red, Gold, Silver, Green or Blue
Weight：66 g / pc
Compatibility：Only for Shimano 10 speed XT & XTR Cassettes.
Installation：
Requires removal of the 17T or 15T cog & spacer from your cassette to use this cassette sprocket. (11-13-15-19-21-24-28-32-36-42) or (11-13-17-19-21-24-28-32-36-42)
If you add 16T cogs, you will remove both the 17 & 15T cogs. (11-13-16-19-21-24-28-32-36-42)