1.Aadopted high quality stainless steel material2.Endoscope adopted Germany optic glass and fiber3.With direction index4.Sapphire lens cover never abrasion5.Endoscope can stand of temperature of 134℃/273°F for sterilization6.The high temperature metal ceramic head can stand more than 10000V fpressure7.Free maintenance valve8.When outer sheath main fixed the endoscope and handle can rotate freely9.Active or passive can be chosen freely