The motorcycle rear view mirror is widely suitable for 10mm thread installation base motorcycle, electric bike, electric scooter and more Package includes A pair side mirrors ,2*10MM clockwise thread screw High strength hard plastic shell and aluminum alloy arm, collision resistance and solid Adopted ultra clear mirror, provide clearer and extensive rearview vision while driving With fully adjustable joint bolt, you can arbitrary adjust to the perfect viewing angle About Us We are committed to developing more beautiful and safer motorcycle accessories and auto parts. Over the years, we have provided the best quality and better service to every rider. Automobile Accessories Visit the Store Universal Motorcycle Visit the Store Ha-Ley Accessories Visit the Store, MIRROR SERIES 10mm Handlebar Rear View Ultra Clear Mirrors You can see behind you in the mirror without your arm blocking view Specification: Bolt Size: 10mm (M10) Mirror Diameter: 4-3/8″??1