Disposable Graves Vaginal Speculum, Sklar, Small, Straight, Plastic, Disposable, Sterile. The Econo Sterile Graves Vaginal Speculum is a gynecological instrument used for performing pelvic examinations, Pap Smears, and examining the cervix. It is a double blade duckbill speculum inserted with the blades closed. The blades are then opened by an external lever and screw. The Graves Speculum has wider blades than the Pederson Speculum and the practitioner can best determine which type and size speculum is most appropriate for the patient. Econo Sterile instruments are ready-to-use, sterile, disposable, floor-grade instruments sold in bulk quantities. This product is a small speculum. It is sold in cases of 50.