Product details:

CRG Hindsight Left Side Bar End Mirror - Black - Unique multi-position mounting system. Aerodynamic design. 6061 T-6 aluminum CNC machined billet construction, anodized finish. Automotive quality convex mirror glass. Stainless steel hardware. Hindsight - 3in diameter, non-folding design, will fit most 7/8in bars. Optional billet internal adapter for mounting on virtually any bar.