Lenses are made from optical grade glass. Lenses are polished and ground into precise prismatic lenses to enhance both quality and clarity. Weighing less than a pound this magnifier will provide comfortable viewing for any amount of time. Ideal for coin and stamp collecting recipes maps newspapers arts and crafts and more. Perfect for seniors who have difficulty with small text. Designed for many applications this magnifier can be utilized both vertically and horizontally depending on the users need. 3X Magnification 5 Focal Length