High Quality Material:- The motorcycle handlebar mount mirror riser extension adapter is made of high-quality aluminum alloy, which is sturdy and durable. Standard quality control is followed to meet standard specifications. Easy to Install:- The motorcycle mirror extension mirror bracket can raise the mirror by 3cm and extend it to 4cm (the maximum extension distance of two mirrors is 8cm). The installation process is simple, practical and easy to use. Function:- The motorcycle riser proximity adapter can effectively prevent the rider from blocking the view of the rearview mirror, and expand the field of view of the motorcycle (or electric bicycle). Good for new, old or bad for new. [Reminder] - If the user needs a larger distance, the two sizes of 10mm and 8mm can be combined (increase the height by 6cm, and the outward extension distance can reach 8cm). WIDE APPLICATION:- M10 / M8 aluminum alloy rearview mirror riser extension adapter is suitable for most motorcycles and electric vehicles whose rearview mirror has M10 or M8 mounting holes.