Specification: O5008 Otoscope(0° , 5mmX58mm), with sheath and 2mm channel O4000 Otoscope (0°,4mm x 50mm) O4030 Otoscope(30°,4mm x 50mm) Features: 1. Adopt high quality stainless steel materials 2. Adopt Germany optic fiber and glass 3. with direction index sapphire lens cover never abrasion 4. Can be sterilized by Gas or Soaking