Vaginal speculum: Middle screw, push-pull type,fastener type For gynecology disease treatment. L,M,S ... service Product name: Vaginal speculum, Vaginal specula, Vaginal Dilator.Type: Pull-push type ,middle screw type,later screw type. faster type ... . Sizes: Large, Medium,Small( In compliance with international standard)Material: Polystyrene( short for: PS)Packing: 1pcs/bag ...