This is a Bleed Port Screw & O-Ring it for Shimano hydraulic brake levers.
Features:
- Replaces lost or broken bleed port screw & o-ring
- Take care when installing. Do not overtighten. It is very easy to strip
Compatibility:
- Dura-Ace/Ultegra Di2: Dura-Ace ST-R9270/Ultegra ST-R8170
















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