Pederson Open-Sided Vaginal Speculum, Sklar, 4 in. x 1 in., Blunt, Straight, Smooth, Open Side (Right), Stainless Steel. The Sklar Pederson Open-Sided 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. This speculum features an open side which allows improved visibility and more room for supplemental instrument access. The blades of the Pederson Speculum are more narrow than the blades of the Graves Speculum. The practitioner can best determine which type and size speculum is most appropriate for the patient. This product has 4 in. X 1 in. blades.