Autel LMVIHC55 MaxiVideo 5.5mm Replacement Imager Head 5.5mm (0.22"") diameter imager head with 100,000 pixel resolution with 1m (3') flexible cable reach White LED lights to illuminate the inspection areas Smallest diameter allows it to be used in the tightest spaces Wonderful for up-close visual inspections in confined areas, such as engine cylinders and small part inspections Imager Head and Cable are waterproof to 3m (10')