Metal bougies and dilating sounds stiff Size: 345 mm Different Tip Sizes Available: 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm 29 mm, 30 mm Life Time Guarantee 100% Quality assured by Complying FDA, CE and ISO Standards from first to last step of Production Medical Grade Supper Quality Raw materials are used to Produce This Product.