It Have a minimum field of view of 140ยบ. 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 180180 degrees updown angulations. 7. Have minimum 10090 degrees rightleft angulations. 8. Independent channels for delivering air and water will be preferred. 9. be supplied with all standard accessories including different types of biopsy Forceps each 2 nos., cleaning brushes each 2 nos.