Questions about Hama Adapter ring

Is it metal or plastic?

Hello. You have a mistake in the description. You write - "This ring allows you to mount a filter or other equipment of 77mm diameter on a lens of 82mm diameter". It is the opposite.

In the header it says lens 77mm, filter 82 mm, further down in the text the opposite filters of size 77 can be put on lenses of size 82 with this adapter). Which applies? I have filters of size 82 mm that I want to use for my new 77 mm lens. Is this possible? What do I need? Thank you very much