METALLICA (Stern) Plastic shield set
Stern METALLICA pinball machine 5 piece set of clear playfield plastic shields.
(All protectors are clear, image is tinted for contrast.)
Plastic protectors mount beneath flat artwork plastics and protrude about 1/8 inch around the perimeter of each plastic piece.
They're made from impact resistant PETG (Polyethylene Terephtalate Glycol-modified) plastic to prevent ball damage to artwork plastics.
Thin enough to mount with existing fasteners, they are also clear and cosmetically unobtrusive.