This variable stiffness insertion tube is an innovation of the EVIS EXERA™ 160 series of video colonoscopes that provides greater maneuverability for the user and less discomfort for the patient. At the same time, it reduces the chances of looping and facilitates insertion beyond the splenic flexor muscle. Optical System Field of View 140ºDirection of View ForwardDepth of Field 3-100 mmDistal End Outer Diameter 11.3 mmInsertion Tube Outer Diameter 11.5 mmBending Section Range of Distal End Bending Up 180º, Down 180º Right 160º, Left 160ºWorking Length 1680 mmTotal Length 2005 mmInstrument Channel Inner Diameter 3.2 mmMinimum Visible Distance 5.0 mmReturn Policy 90 days warranty Return in case of manufacturing defects Return for incopatibility assumed by the buyer