Material:Made with high-quality materials, thisf lange connecting bolt unit is built to withstand the demands of high-performance cycling. 1 Flange Connecting Bolt Unit. Compatible Models:Thisf lange connecting bolt unit is designed to fit a range of models including forShimano for Dura-Ace BR-R9270, for Ultegra BR-R8170, for Ultegra BR-R8070, for 105 BR-R7170, for 105 BR-R7070, for Tiagra BR-4770, for GRX BR-RX810, and for GRX BR-RX400.