and we contacted manufacturing for their input because , course , we m might  come up and choose the material that then manufacturing didn't have the technologies or capabilities to offer us , so uh this is the approach that we took during our um  our research.
So um for the case , um we told we were making a specifica specific assumption that it would be curved in design.
Course , you know , I wanted it to be expandable and shrinkable , but um that uh doesn't seem to b be one of the choic non-option we can uh  we can really seriously explore ,
so then we were thinking about um rubber , but um unfortunately that's been eliminated because of the heat uh factor