Product Description Shimano lockring for CS-M8000 - cassette lockring for XT 11-speed The Shimano lockring for the XT CS-M8000 11-speed cassette is delivered with a spacer. It can also be used as a lockring for CS-M9001, but then it is not a 1:1 replacement. Technical Information:Material:AluminiumCompatibility:XT CS-M8000also fits CS-M9001Manufacturer Number:Y-1RK98010 Contents:1 x Shimano lockring1 x spacers Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com