Astra Depot 1pc Durable 3" Clear View Convex Wide Angle Rear Side Mirror For Bicycle Bike Cycling 7/8" Handlebar Black Optical grade convex glass mirrors, provide best possible position for watching the road behind. Stay safe and aware of your surroundings with this mirror. Lets you shift and stop safely during cycling. 360 degree adjustable, the durable handlebar clamp allows for easy bicycle attachment. Attaches to either left-side or right-side. Easy-to-mount design, engineered to fit all 7/8" handlebar.