Graves Vaginal Speculum, Sklar, Medium, Straight, Stainless Steel. The Sklar 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. This product is a medium sized speculum with 4 in. X 1-1/4 in. blades. It features gold external screws.