Fits: Shimano Dura Ace BR-R9170 BR-RS805 BRRS505  BR-RS405 BR-RS305 Race ready silent power. Swissstop RS disc pads offer a highly balanced combination of predictable braking duability and incredibly low noise in all conditions. The organic compound gives smooth modulation and is rotor friendly.  High quality springs are supplied with every set of Swissstop disc brake pads  Supplied as pairs for one wheel.