Ø 3.3 - 4.0 - 5.0 & 6.0mm Our Pro Flexible Borescopes incorporate a 18,000 fiber, acid-leached imaging bundle, delivering truly excellent image resolution, sharpness, detail, and contrast. Lower cost alternatives do not deliver image quality nearly this high. Pro Flexibles are offered in either 2-, or 4-way articulation! Control the direction-of-view (DOV) of the tip over a 300° range (± 150°) using a thumb lever on the aluminum borescope body. The lever can also be locked to hold a particular view. The LED PRO Flexible sets a new standard of excellence in quality, at a very reasonable price due to newly advanced optical design and construction. Available in diameters of 3.3, 4.0, 5.0 & 6.0 mm.