# ChunkHeader

> Wrapper around the header data for a specific chunk

## Definition

* **Type:** Struct
* **Namespace:** [Unity.Entities](/engine/7000.0/script-reference/unity/entities.md)
* **Assembly:** UnityEngine.EntitiesModule
* **Implements:** [ICleanupComponentData](/engine/7000.0/script-reference/unity/entities/icleanupcomponentdata.md), [IComponentData](/engine/7000.0/script-reference/unity/entities/icomponentdata.md), [IQueryTypeParameter](/engine/7000.0/script-reference/unity/entities/iquerytypeparameter.md)

```csharp
public struct ChunkHeader : ICleanupComponentData, IComponentData, IQueryTypeParameter
```

## Fields

| Value                                                                                          | Description                   |
| ---------------------------------------------------------------------------------------------- | ----------------------------- |
| [ArchetypeChunk](/engine/7000.0/script-reference/unity/entities/chunkheader/archetypechunk.md) | Summary of the current chunk. |

## Static Properties

| Property                                                                   | Description                                           |
| -------------------------------------------------------------------------- | ----------------------------------------------------- |
| [Null](/engine/7000.0/script-reference/unity/entities/chunkheader/null.md) | Constructs a ChunkHeader representing an empty chunk. |