Magnetic / Detachable 180&deg; FishEye (0.28X) Lens for Camera Phones, Notebooks and Pocket Cameras Wide Angle - Up to 180 degrees Includes flat adhesive metal ring that is fixed around the original lens Strong magnet keeps the lens in place Made of top-grade aluminum and high quality glass Metal Ring Diameter: 0.5" (OD) x 0.36" (ID)