The Fiber Viewers are handheld microscopes used to inspect the ends of fiber optic connections. They ensure your termination is smooth, clean and ready for optical transmission. Inspect multimode and singlemode fiber end-faces quickly, and protect eyes from harmful infrared rays with the built-in safety filter. - Ensures clean, smooth terminations ready for optical transmission - Special safety filter to protect your eyes from harmful infrared rays - Handheld microscopes used to inspect the ends of fiber optic connections - FT140 offers 400X magnification