Structural+tubing

**Part Description**
The structural tubing comes in three lengths: 80mm, 145mm, and 220mm. The tubes are used to extend your robot.

**Interfaces**

 * Tube clamps can be clamped onto the tube, and to reenforce the clamp on the hollow tube, inside the tube you can put a tube plug.

**Possible uses**

 * to extend your robot virtically or horizantally