Compatible with SHIMANO L04C metal pad also replacement for K02SK03SK04SK04Ti Compatibility of Brakefor DURAACE Ultegra 105 include BRR9270 BRR9170 BRR8070 BRR7070 BR4770 BRRS805 BRRS505 BRRS405 BRRS305 BRU5000 BRRX810 BRRX400 LifeAfter testing under the same riding conditions the life is 90 of the original Shimano L04C Metal Pads Pros Longer lasting Strong stopping power More consistent in wet and dirty conditions Can handle higher temperatures Cons More likely to be noisy Cooling FinnedDesignHelp reduce heat buildup and brake fade provide rapid heat diffusion lengthens maintenance intervals Packing List2 Pairs 4 Pads brake pads for front and rear brake