These popular replacement pads fit all Campagnolo cartridge style brake shoes from model year 2000 through the current 12-speed groupset brake calipers. If you are replacing Campagnolo pads of this vintage these are your best choice for an aluminum braking surface. They have the grooved recess on the back for use with Campagnolo brakes shoes that use a retention spring/clip located on the pad holder; and work perfectly fine with older brake shoes that do not have the retention clip. In short, if you have Campagnolo calipers that have cartridge pads and was manufactured after year 2000, these are the pads for you. Sold as a four pack.