Absolute Black Premium Oval Road 53T Shimano 9100/8000 - PVDSpecial PVD Rainbow Titanium coating process makes chainrings very durable and incredibly beautiful NOTE: Due to the nature of the PVD process, every chainring is unique and color may vary. Not a single chainring is the same which makes your new ring completely individual Compatibility: Shimano Dura Ace 9100, R9120, R9150 & R9170 Di2 and Ultegra 8000, R8020, R8050 & 8070 Di2, 105 R7000, R7020, R7070. They can also retrofit all 9000 and 6800 series