It is made of stainless steel.
I am no physicist but I just slapped a magnet onto my dogecoin Ballet and it did not stick. Some stainless steel grades are magnetic and some aren't, I do know that but I thought it was aluminum. Ahem. I tried my best to bend the thing and could not without using excessive force so I guess you're right. The stainless steel Ballet wallet types use 304 Stainless Steel - it's inside the tech specs. And 304 Stainless Steel is not magnetic, but other variations such as 409 and 430 are indeed magnetic, but are more susceptible to corrosion and hence damage. No wonder why Ballet opted out of using them.
One of the virtues that working with CAD products has thought me over the last few months.
