Material: Aluminum alloy + resin + glass; Size: Mirror diameter 3.9 inches (10 cm), positive screw 0.3 inches (8 mm); Note: As this is an imported product, there may be small scratches or stains that are not inferior to use.Please be aware of this before purchasing.[Features] It can be adjusted to a wide angle and has enough range of motion, so you can bring the mirror to your best viewing.Round mirror for excellent visibility. Perfect for scooters and business model bikes. The original simple design is very popular. Applications: This is a universal type that can be installed on any model with 0.3 inch (8 mm) positive screws.Please check the mounting bolt diameter of the mirror before purchasing.