Black anodized finish. CNC machined billet aluminum. For stock 25mm axle diameter. For 108mm radial brake calipers. Made of high-strength aluminum and anodized for durability. Perfect for a professional rear radial brake caliper conversion. Designed for strength, rigidity and optimal alignment combined with great aesthetics. For use with radial brake calipers with a 108mm mount hole distance. OEM replacement reference 44089-08