Cassette cover 
Tough, wear and tear resistant polyurethane rubber
Protects the rest of your bike from the harsh edges of your cassette
Protects your car and other gear frSRAM eagleom grease transfer
To suit cassettes from 10-12 speed and range from 10-52T 
Does not interfere with the normal use of ROTOR-VAULT disc brake protection for complete peace of mind!