The PenHandle GenScope Borescopes from GenScope is a Borescope with Field of View(FOV) 55 Degree, Probe / Insertion Tube Diameter 0.6 to 3 mm, Probe / Insertion Tube Length 3.9 to 19.7 Inches, Probe / Insertion Tube Length 100 to 500 mm. More details for PenHandle GenScope Borescopes can be seen below.