What type of Flat Roof Material should I choose for Sarnafil?

I'm trying to get the House Insurance Quote for my house. Our house is made of 100% flat roof and the builder used Sarnafil Material

I tried to get the quote on HomeProtect.co.uk and I don't know which one I should choose for my flat roof material.
On the screen, the following materials are available:

1. Tile
2. Slate
3. Concrete
4. Asbestos
5. Asphalt
6. Corrugated Iron
7. Eco
8. Felt On Timber
9. Fibreglass
10. Glass
11. Metal
12. Plastic
13. Rubber
14. Shingle
15. Stramit
16. Thatch
17. Timber
18. Turnerised
19. Woodwork Construction

Could you please help me to choose the correct material? Thanks.