Got a leak? Then you need this 419 Piece O Ring set in metric sizes. Contains the most popular sizes that you'll ever need. The set is perfect to have around the home for those sudden emergencies or its ideal for plumbers, motor mechanics, engineers or DIY enthusiasts. Sizes R-01 to R-32 (3mm to 50mm) As Below: R-01: 3x1.5 qty 20 | R-02: 4.4x2 qty 20 | R-03: 5x2 qty 18 | R-04: 7x1.5 qty 23 | R-05: 10x1.5 qty 23 | R-06: 13x1.5 qty 23 | R-07: 10x2.5 qty 14 | R-08: 11x2.5 qty 13 | R-09: 13x2.5 qty 14 | R-10: 14x2.5 qty 13 | R-11: 16x2.