4mm Diameter Two – Way Articulating Fiberscope with internal LED Light Source #0057321 - FV420 FreedomView®LED Fiberscope x 20″ (51cm) working length #0057322 – FV440 FreedomView®LED Fiberscope x 40″ (102cm) working length Specifications: .155 inch (4.0mm) shaft...