★ HD automotive grade convex glass bike mirror,wide and clear view. 360 degree rotatable and 180 degree adjustable . The diameter of the lens is 50mm, ideal for drop bar and flat handlebar bikes. ★ Universal design bicycle rear view mirror fits the drop bar (inside diameter within 14-24mm) Applicable for both left and right. ★Made with solid and durable PA6+30%GF material, high impact frame.Solid and Reliable 304 stainless steel screw to install. Improved structure expantion plug handle. Gear-shaped connecting piece,steady connection with the handlebar. ★ Upgrade designed: 50mm smaller lens,scratch resistant, lasting definition convex glass mirror with the shatter-proof film.Great for road bikes.More sturdy and durable plastic frame, reliable stainless steel screw. Easy to install with a 4mm hex key(INCLUDED). ★Satisfaction Guaranteed: Both customer satisfaction and product quality are very important to us. So if you encounter any problems, We can provide a Replacement and lifetime warranty!