product information Brand: West Biking Name: Bicycle rearview mirror (generally universal) Range: 17.4-22mm Colour: Black Size: 115mm x 135mm / 4.53 inches x 5.31 inches Mirror: 70mm / 2.75 inches Material: Glass lens / PC mirror case / P nylon stent oval Weight: (65g - one), rectangular (55g-) Note: Manual measurement allows for error feature - Suitable for all bicycle models, split bases. (Suitable for 17.5 to 25mm rods) - Separate structure facilitating loading and unloading Aluminum alloy is firm and durable. - Multi-angle adjustment A safer driving angle. - Widen the high rearview mirror The field of view is larger. - Double ring screw, stable anti-loose. Packaging included 1 * rearview mirror(it can use for both left and right) Anti-scratch protective film Remove surface protective film before use