SCS Ceramic Series Brake Pads - GREEN, for Caliper brakes of fixie fixed gear road bikes BRAND NEW BRAKE PADS FOR CALIPER BRAKES MATERIAL INCLUDES CERAMIC POWDER WHICH CAN REDUCE THE HEAT GENERATED DRUING BRAKING. SIZE: 50MM WASHER & DOME NUT INCLUDED Comes in 6 different colors (Green, Red, Blue, Yellow, Pink, and Purple). Please search "SCS Ceramic Series Brake Pads" to see them all.