SeeAll See All RR1524 Round Rectangular Glass Indoor Convex Security Mirror, 24" Length x 15" Width (Pack of 1)

How thick is the mirror?

This mirror is a horizonal mount. Can it be mounted vertically and will the bracket work if it is?

The description suggests this mirror is glass, several times, but for the price point I very much doubt that's true. Can someone confirm?

Is this glass or a plastic material?