# Tube
## 
Tube
The Tube command draws a closed cylinder with a concentric cylindrical hole.
**Steps**
1. Pick the center and radius of the base.\
See the Circle command for option descriptions.
2. After drawing the base circle, pick the radius/diameter for the second tube wall.
3. Pick the end of the tube or type a height.
#### Command-line options
-Direction constraint options: Direction constraints restrict the direction of the circle.
* Nonce: The center can be anywhere in 3-D space.
* Pick the second point anywhere using elevator mode, object snaps or other modeling aids.
* Vertical: Draws an object perpendicular to the construction plane.
* Pick the center and a radius or diameter.
* AroundCurve: Draws a circle perpendicular to a curve.
* Select a curve and pick the center of the circle on the curve and a radius or diameter.
-BothSides: Draws the object on both sides of the start point, creating the object twice as long as you indicate.
-WallThickness: Specifies the value for the distance between the inside and outside of the tube.
For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/mesh.htm).
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