Shimano L04C disc brake pads, alloy backed with cooling fins, metal sintered. The Shimano L04C disc brake pads fit the Shimano BR-RS805 (Ultegra) Hydraulic Road Disc brakes & Shimano BR-RS505 (105) Hydraulic Road Disc brakes. The L04C pads use a metal sintered braking compound to keep your brake temperatures stable even on the longest & most demanding down hills. Features Pair of genuine Shimano replacement pads Alloy & Steel back plate using Ice-Technologies heat radiation cooling fins with metal sintered braking compound Fit Shimano BR-RS805 & BR-RS505 hydraulic disc brakes