superdream 360&deg; Rotation Mountain Road Bike Bicycle Cycling MTB Rear View Mirror Handlebar Wide Angle Rearview Adjustable Universal Safety Bike Mirror Black 22MM Riding don't look back behind the situation, provide riders safe practical rear view option Light weight, large lens, scratch resistant.Fast install and remove by adjusting screw Fit for most bike,handlebar diameter is about 22mm.Item Size: 22"8"8cm, Mirror Diameter: 8cm Adjustable to 360 degree.Make you safer when riding on the road With reflector on the back,round shape