1. Since the product is a convex mirror, it is normal to have some spaces at the edge of the rearview mirror after installing the convex mirror. When the convex mirror is pasted, Since it is a convex mirror, the whole rearview mirror become thicker, it stick out a little after installation, which is normal. This condition has no effect on the use of the mirror and its ability to increase of view 2. If the rearview mirror lens of your motorcycle is cracked, but the lens does not fall off, you can directly paste the convex mirror on the rearview mirror lens of your motorcycle, which is very convenient; If the lens of the rear-view mirror of your motorcycle completely falls off and only the rear-view mirror shell is left (without lens), you cannot install convex mirror. 3. installation method: first, you need to wipe the rearview mirror lens of your motorcycle, then you can tear a small part of the back glue at one corner of the convex mirror, and then you need to align the convex mirror with the rearview mirror lens of your motorcycle. After alignment, you can tear off the remaining back glue. Paste it slowly from point to . Do not the convex mirror lens vigorously after pasting to prevent crushing the convex mirror. 4. After installing the convex mirror, of vision you can see through the mirror lens of your motorcycle increase a lot (increase of vision by about one third). This can reduce the blind area of your vision when riding, and greatly increase your riding safety. 5.Only works with rearview mirrors. Modified rearview mirror cannot be installed Fitment: For 350 NSS 350 2020 2021 2022 Condition: Colour:transparent Material:Glass Package Contents: 2 pair x Convex Mirror Lenses Only the above package content, other products are not included. Note: Light reflection 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.