Add a layer of protection for your driving safety! This frameless blind spot rearview mirror is made of high-transmittance glass. The frameless design maximizes the field of vision, and the 150° ultra-wide viewing angle effectively eliminates the side and rear blind spots. The precise size (9.1×2.9cm) is suitable for most sedan, SUV and truck rearview mirrors. It comes with a high-viscosity adhesive backing. You can tear off the protective film and stick it firmly without complicated tools. 2 independent box designs are scratch-proof and dust-proof. It is not only a practical safety accessory, but also a thoughtful car gift choice!