<p>It looks like there are three individual pieces. </p>

<ol>
<li>A small metal ball (Probably not LEGO)</li>
<li>A translucent connector (Probably not LEGO)</li>
<li>A red <a href="http://brickset.com/parts/4125189">LEGO Technic Cross Axle (6538)</a></li>
</ol>

<p><a href="https://i.sstatic.net/Zd2tc.jpg"><img src="https://i.sstatic.net/Zd2tc.jpg" alt="enter image description here"></a></p>

<p>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.</p>

CC BY-SA 3.0
2017-01-20T19:24:33.677Z
Seems legit... Good eyesight!
Mac
CC BY-SA 3.0
2017-01-22T14:43:07.227Z
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
CC BY-SA 3.0
2017-01-22T14:48:40.853Z
I've found a store which sells this item: http://www.mindsensors.com/ev3-and-nxt/88-ball-caster-to-mount-on-nxt-robots. Definitely, it is not an official LEGO piece, so I assume it cannot be used in FLL competitions
Naramsim
CC BY-SA 3.0
2017-01-20T18:32:29.147Z
2017-01-20T18:39:27.940Z
2017-01-20T18:39:27.940Z
Ambo100
<p>I was wondering if <a href="https://i.sstatic.net/5CXI0.jpg" rel="nofollow noreferrer">this</a> LEGO piece is a valid LEGO, and what is its part number?
Can it be used in <em>FIRST</em> LEGO League competitions?</p>

<p><a href="https://i.sstatic.net/UoVYa.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/UoVYa.jpg" alt="enter image description here"></a></p>

CC BY-SA 3.0
2017-01-20T16:36:39.937Z
What makes you think this IS a LEGO piece? Does it have any LEGO markings, or connections with other LEGO elements?
Phil B.
CC BY-SA 3.0
2017-01-22T14:41:32.143Z
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
<technic><part-identification><fll>
Piece identification (Sphere)
Naramsim
# Piece identification (Sphere)

(Asked by: username_0 on 2017-01-20)

I was wondering if [this](https://i.sstatic.net/5CXI0.jpg) 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](https://i.sstatic.net/UoVYa.jpg)](https://i.sstatic.net/UoVYa.jpg)

**Tags:** technic, part-identification, fll

> **Comments:**
> **username_1**: What makes you think this IS a LEGO piece? Does it have any LEGO markings, or connections with other LEGO elements?  
> **username_0**: 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?  

---

## 1 answers

### Answer by username_2 on 2017-01-20. Score: 7

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)](http://brickset.com/parts/4125189)

[![enter image description here](https://i.sstatic.net/Zd2tc.jpg)](https://i.sstatic.net/Zd2tc.jpg)

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.

> **Comments:**
> **username_3**: Seems legit... Good eyesight!  
> **username_0**: 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...?  
> **username_0**: I've found a store which sells this item: http://www.mindsensors.com/ev3-and-nxt/88-ball-caster-to-mount-on-nxt-robots. Definitely, it is not an official LEGO piece, so I assume it cannot be used in FLL competitions  

---

