https://www.bike-components.de/en/absoluteBLACK/Chainring-bolt-covers-for-Ultegra-R8000-p62795/
absoluteBLACK chainring bolt covers for Shimano Ultegra R8000 - set of 4 screws & covers, anodized, ideal for a perfect fit. | bike-components
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https://www.bike-components.de/en/TA/X110-Chainring-Bolt-Set-for-Ultegra-6800-p58201/
TA X110 Chainring Bolt Set for Ultegra 6800: High-quality screws and covers for X110 and Ovalution chainrings. | bike-components
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