Item DescriptionDura 2: updated pad for Shimano cartridge pads, 7.65mm contact for narrower rims and cut outs to reduce weight Super Record: replacement pads for Campy 11sp groupsCampy 8-9: replacement pads for Campy 8-9sp groupsCampy 2000: replacement pads for Campy 10sp groupsBlack: standard compound designed for dry condition ridingSalmon: aggressive compound for wet weather conditionsDual: combination of Salmon and Black compounds for more controlled, smoother stoppingTriple: Kool Stop"s most aggressive compound combination for controlled braking in all conditionsCarbon 2: updated formula for carbon rims, withstands steep descents with reduced wearCarbon 1003: cross-specific formula for carbon rims, superb braking in all cross conditionsItem Specificationsmodel: Dura 2compound: dual: