---
title: outerRadius
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scntube/outerradius
---

# outerRadius

The radius of the tube’s outer circular cross section. Animatable.

## Declaration

```swift
var outerRadius: CGFloat { get set }
```

## Discussion

Discussion The tube is centered in its local coordinate system. For example, a tube whose outer radius is  5.0 extends from -5.0 to 5.0 along the x- and z-axes. The default outer radius is 0.5. An outer radius of zero or less, or equal to or smaller than the inner radius, creates an empty geometry. You can animate changes to this property’s value. See Animating SceneKit Content.

## See Also

### Adjusting a Tube’s Dimensions

- [innerRadius](scenekit/scntube/innerradius.md)
- [height](scenekit/scntube/height.md)