Shimano HyperGlide CS-HG710-12 Cassette Lock Ring & Washer This HyperGlide CS-HG710-12 Cassette Lock Ring & Washer works to replace or repair cassette lock rings and spacers found onboard Shimano HyperGlide CS-HG710-12 Cassettes, along with select other cassettes. Features: Replacement Cassette Lock Rings and Spacers for Shimano HyperGlide CS-HG710-12 Cassettes See compatibility tab for full list of compatible cassettes Specifications: Material: Alloy Color: Black