# I know the Chemical Composition!

#### Importing a Chemical Composition

Here’s how to import a chemical composition using the Predictor tool in Total Materia for internal materials:

1. **Select Composition**: On the Predictor interface, ensure that the "Composition" option is selected rather than "Material."
2. **Import Chemical Composition**: If you already have the chemical composition, use the "Import chemical composition" button to upload your internal data. You can also manually input your chemical composition by selecting the relevant base element (such as Aluminum, Steel, etc.) and specifying the percentage composition of each element in the material. 
3. **Download Template**: If you need a predefined structure, you can download the template provided by Total Materia. The template will guide you through the correct format for importing your composition data, ensuring it’s properly aligned with the system’s requirements.

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All other steps are as described in the "I know the Designation" part.&#x20;


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