Answers.Body: <p>This is <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=7049b" rel="noreferrer">Brick, Modified 2 x 4 with Wheels Holder, Trans-Clear Bottom</a>. White colored version was included in <a href="https://www.bricklink.com/catalogItemIn.asp?P=7049b&amp;colorID=1&amp;in=A" rel="noreferrer">77 sets</a>.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-06T12:45:31.970Z
Answers.Text: ...and they go together with [wheels like these](https://www.bricklink.com/v2/catalog/catalogitem.page?P=7039).
Answers.UserDisplayName: noughtnaut
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-06T16:43:59.440Z
Answers.Text: @noughtnaut this brick is not limited to wheels like these. There are more elements that go together.
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-07T11:57:09.793Z
Answers.Text: Yup. That was intended merely as an example for people who've never seen this brick before.
Answers.UserDisplayName: noughtnaut
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2024-02-04T15:10:39.613Z
Answers.LastActivityDate: 2024-02-04T15:10:39.613Z
Answers.UserDisplayName: Alex
Body: <p>I've got 6 or 8 white 2x4 bricks. But they seem to be rather old as there is a &quot;Pat. Pending&quot; on it and also a &quot;C5&quot;.</p>
  <p>They also have one small hole on each of its sides (but none on top) and the interior is transparent.</p>
  <p>Does anyone know from which set this comes?</p>
  <p><a href="https://i.sstatic.net/gNFte.jpg" rel="noreferrer"><img src="https://i.sstatic.net/gNFte.jpg" alt="view from underside" /></a></p>
  
Tags: <part-identification>
Title: What is this strange and possibly old white 2x4 brick?
UserDisplayName: Essi
ThreadText: # What is this strange and possibly old white 2x4 brick?
  
  (Asked by: username_0 on 2024-02-04)
  
  I've got 6 or 8 white 2x4 bricks. But they seem to be rather old as there is a "Pat. Pending" on it and also a "C5".
  
  They also have one small hole on each of its sides (but none on top) and the interior is transparent.
  
  Does anyone know from which set this comes?
  
  [![view from underside](https://i.sstatic.net/gNFte.jpg)](https://i.sstatic.net/gNFte.jpg)
  
  **Tags:** part-identification
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2024-02-04. Score: 11 | Accepted answer
  
  This is [Brick, Modified 2 x 4 with Wheels Holder, Trans-Clear Bottom](https://www.bricklink.com/v2/catalog/catalogitem.page?P=7049b). White colored version was included in [77 sets](https://www.bricklink.com/catalogItemIn.asp?P=7049b&colorID=1&in=A).
  
  > **Comments:**
  > **username_2**: ...and they go together with [wheels like these](https://www.bricklink.com/v2/catalog/catalogitem.page?P=7039).  
  > **username_1**: @noughtnaut this brick is not limited to wheels like these. There are more elements that go together.  
  > **username_2**: Yup. That was intended merely as an example for people who've never seen this brick before.  
  
  ---
  
  