The photographic contrastor allow photos to be taken with a intraoral black background.they give contrast to tooth and eliminate those elements not required,more esaily get clear oral inside images. -Long handle is more convenient to use -Stainless steel,opaque and reflection-free,not deformed.Can be Autoclave 134?,Can be repeatedly disinfected. -A total of 6 models for different oral parts. Easy to use -6 models:C-2A ,C-2B,C-4A,C-4B,C-4C,C-4D