Shimano Flat Mount Bleeding Block

The Shimano flat mount bleed block is a yellow plastic spacer that is specially shaped and has 9 holes. It is compatible with BR-R9170, BR-R8070, BR-R7070, BR-4770, BR-RX810, BR-U5000, BR-RS805 and other flat mount brakes as well as with the XTR BR-M9100 caliper. Compatibility: - Dura Ace BR-R9170 - Ultegra BR-R8070 - 105 BR-R7070 - Tiagra BR-4770 - GRX BR-RX810 - GRX BR-RX400 - Metrea BR-U5000 - BR-RS805 - BR-RS505 - BR-RS405 - XTR BR-M9100