x-ray film viewer 1 help to see the x-ray film 2 view pieces density > 4.0 D 3 light weight and easy to carry it x-ray film viewer Advantages:1 novel, trendy andsimple design.2 portable product used in indoor and lab.3 View pieces density > 4.0 D(without focusing ring)4 Low thermal noise, no damage to film5 working life over 50000 hours, the power supply 170 ~ 250 V/AC 47 to 63 Hz AC ,low power ...