Great, thanks - I'll have to try that, lower part 14mm is for me also easy, upper part max. 15mm, sometimes 16mm - let's take the next diameter
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至 soundingfan79 : This is probably due to the fact that I often use one of my wife's make-up brushes which has a tapered shape
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至 soundingfan79 : In the upper part (i.e. the opening) easily 16 mm, in the lower part (at the base of the shaft) I struggle with 14 mm
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