Inside diameter: Outside diameter: 03-5825: 3,0 mm 4,0 mm 03-5826: 3,6 mm 4,6 mm 03-5827: 4,3 mm 5,3 mm 03-5828: 5,0 mm 6,0 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.