SafetyGear 250-27-0027 Zenon Z12R Bi-Focals Eyewear with Clear Rimless Frame and Clear Hard Coat Lens, +2.75 Diopters, Pack of 12 Zenon Z12R bi-focals eyewear is made of polycarbonate lens material with +2.75 diopters hard coat Features 28mm wide reading magnifier provides wearer with enough lens to view work Molded bridge design fits most wearers Thin, flexible temples provide secure fit without pinching; rimless design for light weight Available in clear temples frame and clear lens