Shimano XTR M970 Cassettes.Three-piece alloy carrierLargest four cogs are titanium to reduce weight and extend durabilityItem SpecificationsColorGray/TiWeight240gIntended UseMountainCassette SpacingShimano/SRAM 9Cassette Body TypeShimano 9/10/SRAMCassette Cogs11,12,14,16,18,21,24,28,32Number of Speeds9Chain Compatibility9-SpeedRange11-32