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What is this threadless piece called?

  1. Apr 13, 2016 #1
    This piece is abut the size of a coin. What is it called? I would like to buy more, but first I need to know it's name.

    Thanks in advance

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  2. jcsd
  3. Apr 13, 2016 #2


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  4. Apr 13, 2016 #3
    Thank you!!!
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