PRATT Uterine Dilators, 11-1/2" (290mm), double-ended, set of 8, sizes 13Fr/15 Fr, 17Fr/19Fr, 21Fr/23Fr, 25Fr/27Fr, 29Fr/31Fr, 33Fr/35Fr, 37Fr/39Fr and 41Fr/43Fr - REF #'s: MH30-560-1315, MH30-560-1719, MH30-560-2123, MH30-560-2527, MH30-560-2931, MH30-560-3335, MH30-560-3739, and MH30-560-4143