Vividia GB-1815 Rigid 1.8mm Industrial Borescope Kit is designed specifically to inspect and exam items with small opening. GB-1815 has eyepiece viewer at the end of borescope and the insertion tube is ~150mm. The straight tube diameter is 1.8mm (0.07") and length is 150mm (5.9 inch). The side-viewing mirror tube with diameter of 2.2mm which can be fit nicely into the borescope tube to exam details of gun barrel walls or other . The mirror tube can be rotated 360 degree freely. A high quality digital camera with USB and VGA output (included) can be attached with a fiberscope camera adaptor (included). One can preview and take pictures and videos on PC or a TV monitor.
Tech Specs:

Model:                         Vividia GB-1815 Bundle
Probe diameter            1.8mm (0.071")
Probe length:               150mm (5.9")
View direction:             front, 0 degree
Side-view mirror tube:  2.2mm diameter (0.087)
Tube material:              Stainless steel; rigid
Pixels:                         10,000 pixels
Field of view:               60 degree
Focos range:                3mm to 20mm
Eyepiece diameter:       32mm standard

Rear-end camera:  (included, used to take preview on a monitor or a PC)
Image sensor:            CCD 2MP
Sensor resolution:      1600x1200
Output:                      USB2.0 and VGA
Software on Windows  "Camera" or "Amcap" or "Digital Viewer"

Picture
What is included:
GB-1815 rigid fiberscope, side-view mirror tube, portable light source, rechargeable lithium battery, AC charger, eyepiece camera adaptor, a HD digital USB/VGA camera.
Pictures taken from front view
Pictures taken with side-view mirror