Rock ola Jukebox Tempo Pilasters. A magnet will not stick. Aluminum?

Here is a pair of TWO (left and right) pilasters for the Rock ola Tempo
Jukebox. I have been told they are from a Mexican machine and should therefore be steel. However, a magnet will NOT stick to them and I think they are of some other metal. Please examine the photos carefully and make your own decision.

I will ship these USPS Ground. The package will be 36" long X 22" wide X 12" high. I ESTIMATE the weight of the package will be 20 pounds. Buyers pay shipping costs and international buyers are also responsible for paying all customs and duties. I do not understate the value of items on customs forms.

Thanks for looking.