Shimano Cable Guide. Shimano Part Code: ASMSP18M. Fits underneath the bottom bracket to guide cables.
Shimano SM-SP17T / SP17-T Dual Cable Routing Guide for 40mm - Y66Y98510
Shimano SM-SP18M / SP18-M Dual Cable Routing Guide Y66Y98600 Genuine
Shimano Di2 Frame Grommets SM-GM02 for Internal Cable Routing- Oval 7x8mm - 4 Pk
Shimano Di2 Frame Grommets SM-GM01 for Internal Cable Routing - Round 6mm - 4 Pk
Bosch PowerMore cable cable routing away from the battery holder BCH3925
Internal Cable Routing Tool Magnetic Kit For Bicycle Hose Gear Brake Cable New
