The Mirrycle mounts in minutes with the wrench that is included. The mirror is a 3" round, convex glass mirror with a wide field of view. The mirror is adjustable to any viewing angle. - Fits inside handlebars with 13.75mm – 22.5mm (.54" to .875") inside diameter

- The original third-Eye eyeglass mirror design - Shatter-Proof aluminized glass mirror, Resists discoloration - Mounts to left or right sun/Eyeglass temple-Arm - Rubber-Tipped outer prongs provide a no-Slip mount

Experience an extra measure of security when you ride with this adjustable, wide-view mirror. The High Definition Glass Lens provides a superior view of approaching vehicles. Quick, simple, external attachment to left side, flat handlebars. Mounts to hybrid, commuter, road, mountain or recumbent bikes. - Fits bar diameter 21 to 26mm - Quick, simple, external attachment to left side, flat handlebars - 4.125-inch high-definition glass, wide-view mirror provides a superior view of approaching vehicles - Nylon frame and body - Oval mirror rotates 360 degrees