Attwood Marine Perma-Plate Ski Mirror Universal 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.