- Olympus CYF-3 Flexible Cystoscope • Field of View (FOV), (degree) 120 •Insertion Tube Outer Diameter, mm 5.2 •Length of working part, mm 380 •Biopsy channel, mm 2.2 •Pediatric or Adult - If you require any further information about the price and condition, let me know. Return Policy: Items are sold as-is with no returns or refunds available unless explicitly stated.