> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Solid Attribute

## About this Block

**What it does:** Applies material attributes for solid elements.

**Common uses:**

* An input in [**Solid Domain**](/block-documentation/blocks/structures/model/solid-domain.html).

**Tips:**

* You can use multiple FE Attributes in a Domain.
* If no Region is defined, the attribute applies the material to the entire mesh. Use the Region input to define a material in a specific area.
* When defining a Region for the attribute, all elements need an assigned attribute. Do this by providing one or more additional attributes for all regions, or at least one additional attribute without a Region to apply that attribute to all areas not covered by previous Region(s).

## Example File

Download Example: [FE Solid Attribute](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/fe_attributes.ntop)
![FE Solid Attribute](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/fe_solid.png)

***

Define material properties as attributes of solid elements.

### Inputs

| Name     | Type                                                                 | Description                           |
| -------- | -------------------------------------------------------------------- | ------------------------------------- |
| Material | [Material](../../../../block-documentation/types/material)           | The underlying material.              |
| Frame    | [Frame](../../../../block-documentation/types/frame)                 | The material orientation.             |
| Region   | [Implicit Body](../../../../block-documentation/types/implicit-body) | The region this attribute applies to. |

### Outputs

| Type                                                                     |
| ------------------------------------------------------------------------ |
| [Solid Attribute](../../../../block-documentation/types/solid-attribute) |