These masks are polyurethane casts of a restored cast of a screen used prop. The materal used is a brand new light weight, but very strong poly plastic. These grey / black examples have been dyed and as such are more expensive than the undyed examples.
Some cleanup is needed, but the work involved will be minimal.
Eyes and mouth areas will need opening.
One cast helmet badge is also included with these dyed masks. There are 5 different badges and one will be randomly selected.