Sklar's Pratt Uterine Dilator is a double-ended OB/GYN instrument used for progressive dilation of the uterus. It is most frequently used during intrauterine procedures such as D&C and D&E. The size of these dilators is determined by the circumference of the tip and measured in French units, with one French unit equalling 1/3mm. Pratt dilators are available in several sizes. Each dilator has two different size tips. In comparison to other intrauterine dilators, Pratt dilators taper more gradually and are slightly lighter than Hegar dilators. They do not have a cuff to serve as a stop for depth of insertion such as featured on Hank dilators. The instrument is straight in the middle, slightly curved at each end, with a smooth, rounded tip. This product is a set of eight dilators, in a khaki roll, of the following sizes: 13/15, 17/19, 21/23, 25/27, 29/31, 33/35, 37/39, and 41/43.