The speculum according to Pratt is mate of medical-grade stainless steel and comes with high-gloss polished finish. The Pratt speculum is designed for rectal examination, but it can be used also vaginal.
The speculum according to Pratt comes with two insertable rounded blades. After insertion, the spring-loaded scissor handle is pressed together, the desired with up to about 4.5 cm is adjusted by a screw at the side of the handle.
Size: The speculum Pratt has an insertable length of 8 cm, the blade width is about 1.5 cm, they opens up to a maximum of 4.5 cm.
The speculum according to Sims is made of surgical stainless steel and it is used for rectal examinations. The Sims speculum comes with two rounded blades which spread to a maximum of about 4.3 cm apart. Once the desired spread width is achieved, the sims speculum can be kept at that width by turning the adjustment screw on the side of the speculum.