Technical Specification 1.It Have a minimum field of view of 140º. 2. It has a depth of field from 5 to 100mm. 3. The insertion tube have maximum 12.8mm diameter. 4 It has an instrument channel of at least 3.2mm inner diameter. 5. it have a minimum working length of 1600mm. 6. it have minimum 180/180 degrees up/down angulations. 7. Have minimum 100/90 degrees right/left angulations. 8. Independent channels for delivering air and water will be preferred.