Precision ground and polished optical glass lenses. The padded headband is lightweight and fully adjustable. Can be worn with spectacles.
Model 28030-02 has 2,5x magnification @20 cm working distance
Model 28030-03 has 2,75x magnification @15 cm working distance (most popular)
Model 28030-04 has 3,5x magnification @10 cm working distance