HIGH QUALITY & DURABILITY-- This bicycle rear view mirror for road bike mountain bikes is equipped with high definition acrylic lenses, PC shell + PA frame,nylon resin material,which is shockproof and shatterproof,provides you with a long service life.The bicycle rear view mirror can rotate 360,can be adjusted to any viewing angle. Thanks to the rotating mirror so you can easily see everything behind you,which increases safety and improves riding performance. HD CONVEXER BICYCLE MIRROR-- Size:15 cm 8 cm (length width), the field of view is wider and clearer.The surface of the high-resolution convex mirror is smooth and anti-glare, which provides you with a clearer and wider view and makes driving safer. Rear Reflector-- Rear View Mirror for Electric Bikes Bring you a new riding experience. On the back of the rearview mirror housing is the thoughtful function of the reflector,ensuring safety even in low light conditions,allowing other vehicles to better see oncoming cyclists. WIDE APPLICATION-- The bicycle mirror is suitable for handlebars with a diameter of 21 to 23 mm.Please measure the outer diameter of the mirror bicycle handlebar before purchase.Suitable for e-bikes,racing bikes,mountain bikes,city bikes,scooters etc.