3T Difflock mechanism. This is the internal "guts" of the seat post to attach the saddle to the post. This version fits saddles with round rails only. Used on Felt aero posts with Difflock mechanism only.
3T Difflock mechanism. This is the internal "guts" of the seat post to attach the saddle to the post. This version fits saddles with round rails only. Used on Felt aero posts with Difflock mechanism only.
