Really useful both in the workshop and in the paddocks this little case contains 225 different sized O-rings : from 5 to 26 mm in diameter with varying thicknesses to help you cover all eventualities ! 20x o-ring 3x5x1 mm 20x o-ring 4x6x1 mm 20x o-ring 4.5x8.5x2 mm 20x o-ring 5x9x2 mm 20x o-ring 6x10x2 mm 20x o-ring 6x11x2.5 mm 20x o-ring 6x12x3 mm 20x o-ring 7x11x2 mm 20x o-ring 8x12x2 mm 5x o-ring 9x12.5x2 mm 5x o-ring 10x14x2 mm 5x o-ring 12x18x3 mm 5x o-ring 13x19x3 mm 5x o-ring 14x19x2.5 mm 5x o-ring 17x22x2.5 mm 5x o-ring 18x26x4 mm 5x o-ring 20x24x2 mm 5x o-ring 22x26x2 mm