9 / 9.5 / 10 / 10.5 / 11 / 11.5 / 12 / 12.5 / 13mm. This is FREE for orders over £50, otherwise £4.95. 1 / 1.5 / 2 / 2.5 / 3 / 3.5 / 4 / 4.5mm.
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