ISPConfig > Billing > Invoice item template

Please explain this:
Is there a connection between ‘Template:’ and “ISPConfig > Billing > Invoice item template”?

<label><?php echo __( ‘Template:’ ); ?></label>
<select name=”template”>
<option value=”1″>5GB Webspace</option>
<option value=”2″>2GB Webspace</option>
<option value=”3″>10GB Webspace</option>
<option value=”4″>Free Webspace</option>
</select>