The MEGA-7 from Stanlay is a Borescope with Operating Temperature -10 to 60 Degree C, Storage Temperature 0 to 40 Degree C, Probe / Insertion Tube Diameter 5.5 mm (3.9 mm Optional), Probe / Insertion Tube Length 3.3 ft (1 m) (Probe), Probe / Insertion Tube Length 3.3 ft (1 m) (Probe). More details for MEGA-7 can be seen below.