Attwood Marine Perma-Plate Ski MirrorUniversal mount installs on dash or windshield. Shatterproof, 180 convex mirror eliminates blind spots. Mirror is compact and constructed of lightweight chrome plated zinc ZAMAK. Mirror adjust to any position up-and-down or side-to-side, the secures in desired location.Note: In some states and provinces, ski mirror of a certain size/dimension, and/or and onboard observer may be required. Check local requirements.