Stainless Steel lines are typically the first upgrade you should make Stock rubber lines will break down and expand, causing a spongy feel or worse. Steel lines eliminate expansion which results in consistent feel and performance Made with only DuPont virgin grade PTFE (Polytetrafluoroethylene) inner core 64 strand braid Includes all mounting components, extra washers, and line end labeling, and bike specific installations R&D and manufacturing done in the US. CLTCH LINE SS FK003D90CL