Completely from stainless steel for the highest corrosion resistance. All mechanical connections are laser-welded. Distal and proximal cover lenses exist of sapphire glass and are soldered. This means no glue joints, no leakage and no scratching. "High-Resolution" optic systems of especially excellent image quality. ESCAD Medical endoscopes are compatible with shafts of different manufacturers. Trouble-free integration of the ESCAD Medical endoscopes in your existing accessories instruments. Different lines of sight are marked in colours. The blue ring means, the endoscope is autoclavable .