Shimano, ISMGM01, SM-GM01, Grommet, 6mm, 4pcs
Di2 rubber grommets for use with frames that feature internal cable routing
Securely holds the EW-SD50 in the frame's cable routing holes, which protects the cable, seals the hole & gives a cleaner look
SM-GM01: For 6mm diameter round holes; SM-GM02: For 7x8mm oval holes
Sold in bags of 4