Optivisor Binomagnifier No.7 - 2.75x Magnification

Optivisor Binomagnifier No.7 - 2.75x Magnification Optivisor Binomagnifier No. 7 - 2.75x Magnification Optivisor lenses are ground and polished to opthalmic standards. The frame is made of lightweight plastic that is durable and impact-resistant, the padded headband can be adjusted to fit any size quickly and easily, the fully pivotable visor allows easy flip up viewing, lens spec no.7 2.75 x mag 6" focal length.