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.