- Material is surgical steel - Total length: approx. 220mm / Ø tip: from approx. 6.5mm to 9mm tapered - Ø tube: approx. 6mm/ full drill hole: approx. 3mm - Incl. 4 rings: 25mm, 28mm, 30mm, 32mm, replacement tube, 2 disinfecting cloth - Because of its flexible design, this dilator can be inserted especially deep