A smaller version of my original Rung head (based on the design by Alex Milne), with fixed eyebrows, designed to work on smaller figures where the original head would be too big!
The head is designed to work with a 5mm ball joint, and comes with a ball joint connector included, which can be trimmed down to length if the figure you're using as a base doesn't have a ball joint in the neck.
Installation is dead easy: simply follow the steps in the pics above, slotting the ball into the socket, then pushing on the helmet piece, to lock the joint in position and complete the head.
Note: as this is a smaller head, the tolerances are somewhat tighter, and as such, you may need to sand down the inner surfaces of the vertical flaps on the face-piece, to ensure the helmet-piece will slide in comfortably.
Tested in WSF!