Hi Edwina, it's hard to say from this image if they're timber or steel - I'd say you could use either, but timber could give you some problems as it weathers. Steel with an appropriate finish (such as a powder coat) would probably be your best bet. You could also use a custom designed pattern, rather than just the slats, depending on the look you're after. If you're interested in anything similar in steel, check our page and drop us a line!
Nic Sims
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