The artist made three miniature helmets. They are made of some standard copper caps, and copper tube and a paint brush.
The first is the classical Greek Spartan helmet on top of a brush hair. Hair is made of an old painting brush.
The second is the combat helmet from PubG. This is an fps game and that helmet is very famous, the gamers love it.
The third in the title called the Viking helmet. But really it’s not a tradition Viking helmet. It can actually be a fantasy or even a Skyrim helmet.
More info: carvermind.com