uxcell&reg; 6 Pcs Black Frame Credit Card Reading Magnifier 3x Magnifying Lens The focal length of this magnifying glass needs to be adjusted to a suitable place thus to make yourself comfortable Magnification : 3x; Len Size: 72 x 41mm /2.8" x 1.6"(L*W) ; Weight: 20g Suitable for examining fine prints in newspapers, documents, maps, electronic parts, photos and pill bottles Durable and mobile, made out of flexible PVC material with a reinforced edge; It's lightweight and won't break Lightweight, ideal for long reading time without tiring your hands