I was wondering if this LEGO piece is a valid LEGO, and what is its part number? Can it be used in FIRST LEGO League competitions?

enter image description here

  • 3
    What makes you think this IS a LEGO piece? Does it have any LEGO markings, or connections with other LEGO elements?
    – Phil B.
    Jan 20, 2017 at 16:36
  • Well, the red piece is for sure a LEGO piece and fits perfectly with the transparent one. Maybe is a piece made by some third-party company. Can it be?
    – Naramsim
    Jan 22, 2017 at 14:41

1 Answer 1


It looks like there are three individual pieces.

  1. A small metal ball (Probably not LEGO)
  2. A translucent connector (Probably not LEGO)
  3. A red LEGO Technic Cross Axle (6538)

enter image description here

The red piece seems to share the same amount of ridges ridges (three) and seems to be a good match in size and colour. I'm not familiar with this connector being used in this manner, I'm fairly sure the other two pieces are not LEGO.

  • Seems legit... Good eyesight!
    – Mac
    Jan 20, 2017 at 19:24
  • Thanks for the answer, maybe the other two pieces are made by third-party companies and thus are not official LEGO pieces. So these two pieces can't be used in FLL competitions...?
    – Naramsim
    Jan 22, 2017 at 14:43
  • 3
    I've found a store which sells this item: mindsensors.com/ev3-and-nxt/…. Definitely, it is not an official LEGO piece, so I assume it cannot be used in FLL competitions
    – Naramsim
    Jan 22, 2017 at 14:48

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