These disc brake pads fit a variety of SRAM and Avid brakes and offer industry leading brake compounds for consistent, confident performance. Features: Low noise, high performance semi-metallic compound lasts longer than resin Steel backing plate Compatible with Avid Elixir R, CR, CR Mag, 1, 3, 5, 7, 9, X.0, XX, World cup Specs: Compound Semi-Metallic Heat Sink No Backing Plate Material Steel Pad Shape Number 01