Answers.Body: <p>They were used until 1990 for trains, the holes are there to stick in the wheels.</p>
  
  <p>This is the part: <a href="http://www.bricklink.com/catalogItem.asp?P=7049b">http://www.bricklink.com/catalogItem.asp?P=7049b</a>
  And these (for example) were the wheels: <a href="http://www.bricklink.com/catalogItem.asp?P=wheel2a">http://www.bricklink.com/catalogItem.asp?P=wheel2a</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-21T19:44:07.720Z
Answers.Text: you mean the 1970's, right ?
Answers.UserDisplayName: Stephane Delcroix
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-22T05:17:17.753Z
Answers.Text: Makes sense as there was also wheels and tracks in the haul. Thanks a lot.
Answers.UserDisplayName: Keller
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-22T15:16:48.023Z
Answers.Text: You're welcome.
  @Stephane, no I mean the 1990's, it was still in basic building sets in the late 1980's and the early 1990's.
Answers.UserDisplayName: Fra Sprea
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-22T20:17:06.387Z
Answers.Text: oh, I remember them in the early 80's.
Answers.UserDisplayName: Stephane Delcroix
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-28T19:55:40.803Z
Answers.Text: @Laz75 According to the BL page you posted, it seems most of these kits with these parts were released in the 70s, with only a tiny handful of kits in the 90s having these in them.
Answers.UserDisplayName: Mr. Shiny and New 安宇
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-29T20:21:23.097Z
Answers.Text: @Mr.ShinyandNew安宇 you're absolutely right, that's why I wrote "until"!
  
  The white ones though, the ones in the picture, are actually only from the 1960s amd 1970s, you're right.
Answers.UserDisplayName: Fra Sprea
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-10-21T06:50:52.620Z
Answers.LastActivityDate: 2014-10-21T06:50:52.620Z
Answers.UserDisplayName: Fra Sprea
Body: <p>I recently bought at haul and found a bunch of these regular sized bricks. Can anyone identify the for me?</p>
  
  <p>They are 2x4 bricks, but with holes in the side of the bricks:</p>
  
  <p><img src="https://i.sstatic.net/aDmXk.png" alt="Bricks with holes"><br />
  From: <a href="https://i.sstatic.net/Atc7p.jpg" rel="nofollow noreferrer">https://i.sstatic.net/Atc7p.jpg</a></p>
  
  <p>It says Lego on the stud, but no part numbers are to be found anywhere, so I guess they are old.</p>
  
  <p>Any help is appreciated.</p>
  
Tags: <piece-information><part-identification>
Title: What are these bricks with filled interior and holes/tubes going through?
UserDisplayName: Keller
ThreadText: # What are these bricks with filled interior and holes/tubes going through?
  
  (Asked by: username_0 on 2014-10-21)
  
  I recently bought at haul and found a bunch of these regular sized bricks. Can anyone identify the for me?
  
  They are 2x4 bricks, but with holes in the side of the bricks:
  
  ![Bricks with holes](https://i.sstatic.net/aDmXk.png)  
  From: <https://i.sstatic.net/Atc7p.jpg>
  
  It says Lego on the stud, but no part numbers are to be found anywhere, so I guess they are old.
  
  Any help is appreciated.
  
  **Tags:** piece-information, part-identification
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2014-10-21. Score: 9 | Accepted answer
  
  They were used until 1990 for trains, the holes are there to stick in the wheels.
  
  This is the part: <http://www.bricklink.com/catalogItem.asp?P=7049b>
  And these (for example) were the wheels: <http://www.bricklink.com/catalogItem.asp?P=wheel2a>
  
  > **Comments:**
  > **username_2**: you mean the 1970's, right ?  
  > **username_0**: Makes sense as there was also wheels and tracks in the haul. Thanks a lot.  
  > **username_1**: You're welcome. @username_2, no I mean the 1990's, it was still in basic building sets in the late 1980's and the early 1990's.  
  > **username_2**: oh, I remember them in the early 80's.  
  > **username_3**: @Laz75 According to the BL page you posted, it seems most of these kits with these parts were released in the 70s, with only a tiny handful of kits in the 90s having these in them.  
  > **username_1**: @username_3 you're absolutely right, that's why I wrote "until"!  The white ones though, the ones in the picture, are actually only from the 1960s amd 1970s, you're right.  
  
  ---
  
  