Hello, thank you for the answer, the template in the app includes only simple products, not with variants. I have to adapt my product whit all the fields I need and then export, thank you

Hi,

If you have odoo12 installed with you you can get the sample import templates form the import screen of corresponding table.

What you have to do is that, open the odoo12 and open the product tree view click the import button, then in the coming view you can see a option in the screen to download the sample template.

You can download it and use. If you haven't installed odoo12 yet,  you can try to get it from Odoo runbot. 

The other option is to manually export some products with choosing the required fields and use it as template.

Thanks