Need to install the car model: handlebar the inner aperture needs to be 17.4-22mm. Can be used within the range. Features: Providing you with a clearer and wider field of eyevision. You can see the road behind without turning your heads. Flexible angle: 360 rotatable mirror for safes riding. This bicycle mirror is made of not glares coating and quality can provide you with a clearer and wider field of eyevision. Convex large mirror area. Larger rearview mirror area make riding safer. Reinforced nylon bracket, higher hardness not easy to be broken, not aging. Specifications: Suit for: 17.4-22mm handlebar Back: with reflector Material: nylon Item size: 150 * 87mm / 5.9 * 3.4in Item weight: 85g / 3.0ounce Package size: 125 * 100 * 30mm / 4.9 * 3.9 * 1.2in Package weight: 125g / 4.4ounce Packing List: 1 * Rearview Mirror