Pad material is aramid fiber, metals, abrasives and lubricants mixed with Phenol Resin Metal powder components exceed 50% of pad material Excellent pad life Can be used with stainless steel rotors Shoe Diameter - 149.3 Width - 25mm This Item Fits the Following Applications: 1987 Yamaha SRX250, Application: Rear 1984-1989 Yamaha XT600, Application: Rear 1983-1984 Yamaha IT490, Application: Rear 1982-1990 Yamaha YZ490, Application: Rear 1982-1983 Yamaha XT550, Application: Rear 1982-1983 Yamaha XT550, Application: Front 1981-1983 Yamaha IT250, Application: Rear 1981-1982 Yamaha IT465, Application: Rear 1981 Yamaha YZ250, Application: Rear 1980-1981 Yamaha YZ465, Application: Rear 1980-1981 Yamaha SR500, Application: Rear 1976-1981 Yamaha XT500, Application: Rear 1975-1978 Yamaha DT400, Application: Rear 1974-1979 Yamaha DT250, Application: Rear 1974 Yamaha DT360, Application: Rear 1974 Yamaha DT360, Application: Front 1974 Yamaha DT250, Application: Front 1973-1974 Yamaha SC500, Application: Rear 1973-1974 Yamaha MX360, Application: Rear 1973-1974 Yamaha MX250, Application: Rear 1973 Yamaha RT3, Application: Rear 1973 Yamaha RT3, Application: Front 1972 Yamaha RT2, Application: Rear 1972 Yamaha RT2, Application: Front 1970-1971 Yamaha RT1MX, Application: Rear 1970-1971 Yamaha RT1MX, Application: Front 1970-1971 Yamaha RT1, Application: Rear 1970-1971 Yamaha RT1, Application: Front 1966-1966 Yamaha YA6, Application: Rear 1966-1966 Yamaha YA6, Application: Front