These fit Miche hubs. There are two rings
1) 36x1mm threading for all Miche hubs with a carbon hub shell (supertype, 999 e.t.c)
2) 37x1mm threading for all other Miche hubs with alloy shells.
These do not fit the magnum or monolithic hubs or the excite wheels. Please check what you have before buying.
The rings have 30T. Some miche hubs had 20T rings these can be replaced with the 30T ring as the 20T ring is no longer made.
The tool to remove the ring is a spare that will be available.