... rotate 360° positively and negatively, and stop if need. The adjustable center bracket can let the probe at the centre all ... endoscope is mainly used for the inspection within large-diameter pipe, including jointing quality, external finish, rust degree, crack instance, ... : 6 ~ 20m ( can be lengthened if need)7. Best work pipe diameter: Φ200 ~ Φ500mm8. Display: 8" LCD monitor9. Horizontal resolution: ...