Black anodized Contrast Machined finish. CNC machined billet 6061-T6 aluminum with 110 dB which is louder than stock. Diameter 150mm.. Note: Arlen Ness horns can be style matched to other Arlen Ness components like air cleaners foot pegs grips gas caps head lamps etc. 92-22 XL 08-12 XR1200 (NU)