Shimano roadmtb ptfe gear 12mm inner wire ptfe coated stainless steel inner gear cable for the ultimate in smooth shifting performance designed to complement the top of the range shimano dura ace and xtr groupsets stainless steel precision ground round ptfe coated inner wires offer smooth low friction shift action with increased service life due to its anti corrosion nature suitable for front or rear mechs just cut to fit use with sp41 gear cable outer 12 mm x 2100 mm