Adapters to connect the unconnected. Shift and brake variants that can't be connected to one socket at the factory get a new chance. This will create the popular beautiful view of the groomed cockpit and more space on the handlebars. ISEV-ISB is for I-SPEC EV derailleur and Shimano I-SPEC B brake MM-ISEV is for SRAM MatchMaker derailleur and Shimano I-SPEC EV brake MM-ISII is for SRAM MatchMaker derailleur and Shimano I-SPEC II brake Weight: MM-ISII - 10.5g | MM-ISEV - 9g | ISEV-ISB - 10g | ISEV-ISII - 6g | MM-MAG - 12g | ISEV-MM - 9.5g | 22 Clamp-ISII - 12.5g | 22 Clamp-ISEV - 10g Material: 6061-T6 aluminium