OE Replacment pad for 7800 brake calipers, but will work with any Shimano brake shoe that has removable shoes that use set screws. This pad is the same comound as the R55C2, but is 1mm thicker for better wear.
The only thing good about these pads is that they will help sell rims. They constantly ate into the rims on multiple wheelsets causing a grinding noise whenever you brake. After every ride you have to dig out bits of aluminum out of the pad only to have to do it again and again after every ride. Spend less and buy richie road logic black pads they stop well and do not eat into the rim.