CIPA Premium Mirrors are advanced family-recreational boat mirrors that are designed to allow a view of both sides of the boat as well as the rear of the boat. Constructed of heavy-duty materials with OE grade glass to ensure high quality and a crisp clear view. The unique Pivot Cup-Mount Bracket provides over 120° of easy adjustment with foldable storage. Clam shell clamp design fits most windshields from 3/8" to 1-1/4" with no drilling required for installation. The CIPA Ellipse Boat Mirror is a full 11" x 4" multi-lens mirror with one 6" x 3.25" convex stationary lens and two adjustable 2.5" x 2.5" flat lenses, one on each side. Great for viewing all of the action behind your boat. Adjustable flat mirror on each side Pivot Cup-Mount Bracket with 120° of adjustment No drilling required for installation | Ellipse Marine Mirror