[Home](./index.md) > [bitburner](./bitburner.md) > [WarehouseAPI](./bitburner.warehouseapi.md) > [exportMaterial](./bitburner.warehouseapi.exportmaterial.md)
## WarehouseAPI.exportMaterial() method
Set material export data
Signature:
```typescript
exportMaterial(
sourceDivision: string,
sourceCity: CityName | `${CityName}`,
targetDivision: string,
targetCity: CityName | `${CityName}`,
materialName: string,
amt: number,
): void;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| sourceDivision | string | Source division |
| sourceCity | [CityName](./bitburner.cityname.md) \| \`${[CityName](./bitburner.cityname.md)}\` | Source city |
| targetDivision | string | Target division |
| targetCity | [CityName](./bitburner.cityname.md) \| \`${[CityName](./bitburner.cityname.md)}\` | Target city |
| materialName | string | Name of the material |
| amt | number | Amount of material to export. |
Returns:
void