Adjustable-360-degree rotating mirror, after several adjustments, you can find the most suitable position to take a look. The axle length places the mirror at the perfect distance in front of you, so it remains stable even in bumpy rides. Durable and clear vision-ABS electroplated convex mirror. No risk of mirror damage. It only needs to be clear at a glance, with a clear vision and a broad vision. Easy to install-tear off the white paper and to the helmet. Just align it to the position you want, and then lock it in your favorite adjustment. Easily install on the left and right sides. (Note: Before use, please remove the transparent protective film on the mirror surface.) mirror-ultra light to wear. The sturdy polymer structure makes this bicycle mirror a perfect combination of super strength and feather weight. One size. Application-It is used as a rearview mirror mounted on the helmet to improve safety while driving and provide you with an interesting and experience. colour:Black Material:ABS size:Length about 22cm Package Contents: 2 x bike helmet mirror Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.