Product Description : Speculum in general are a family of medical instruments which are used to visualize the interior of the body by inserting the instrument to get a better view. In the case of a vaginal speculum, the instrument includes a blade which is gently inserted and used to dilate the vagina to make it easier to see. Classically, doctors use a two-bladed speculum which resembles the bills of a duck, with a locking handle to manipulate the blades, although single blade vaginal speculum are also available. It can be used for the checking and treatment of gynecology disease in hospitals or clinics . Before using it , user must read the usage manual , and then take the speculum , push the " duckbill " of speculum that is closed into the vaginal slowly . Open the " duckbill " of speculum according to demand , fix the nut of speculum ,then it can be used for checking and treatment of gynecology disease . After all ,loose the nut of speculum , and take " duckbill " of speculum out of the vaginal slowly . The speculum is for single use only and must be destroyed after use . Reuse is prohibited . Specification : Made of polystyrene ; It is a transparent substance , non-toxic , medical grade Size : Large / Middle / Small ( In compliance with international standard ) Type : Side screw , French type , Middle screw , Rack type , American type Supplied sterile in individual polybag or Film + Polybag or blister pack sterilized by ethylene oxide gas Package :  1 pc / bag , 100 bags / carton . polyethylene bag ( PE bag ) , polypropylene bag ( PP bag ) , and paper-plastic bag can be choosed .