Motorcycle Rearview Mirror Extender EXPANDED VISION: The mirror base adapter effectively prevents the rider from blocking the view of the mirror, helping to expand the view of the motorcycle (or e-bike) while protecting the rider's safety. Motorcycle mirror adapter Suitable for most motorcycles and e-bikes with M10 or M8 mounting holes for the rearview mirror.HIGH QUALITY MATERIAL: Mirror mounting riser adapter is made of high quality aluminum alloy, strong and durable, can be used for a long time, the surface of the adapter with coating, smooth and beautiful, can provide more security for your life, and the good material can increase the service life of the product.ADJUSTABLE EXTENSION DISTANCE: If users need to extend longer distance, they can combine two sizes of 10mm and 8mm mirror extensions (rise height is 6cm, maximum extension distance is 8cm). Features: Constructed of premium aluminum alloy, sturdy, rigid and durable. Be able to lift rear mirror by 3cm and extends it up to 4cm (the maximum extending distance of two rearview mirrors is 8cm). Effectively prevent riders form blocking the view of the rearview mirror, help broaden the viewing range of the motorcycle (or electric bicycle). If users need to extend wider distance, 10mm and 8mm two sizes can be used in combination (6cm rising height, outward extending distance up to 8cm). Simple installation process, practical and convenient to use. Suitable for most motorcycles and electric vehicles whose rearview mirrors are with M10 or M8 mounting apertures. Specification: Condition: Brand New Material: Aluminum alloy Main Color: Black Thread Diameter: 10mm(M10), 8mm(M8) Extended Horizontal Distance: 4cm Risen Vertical Distance: 3cm Package Weight: Approx.106g/3.7oz Package List: 2 * Mirror Adapter 2 * 10mm Screw 2 * 10mm Gasket 2 * 8mm Screw 2 * 8mm Gasket