This is a simple little mod for the Creature From The Blsck Lagoon pinball that is fastened by strong double sided tape to the lhs SS
ramp flap that leads to the lhs flipper. It is hollow and still allows some light through the speaker vents and does not reduce any visibility as it is slightly smaller than the ramp flap. You have a few material choices with the polished aluminium plastic being the value and look.
The photo is from an average quality print at home, and I will replace it once I get my part shipped to me but gives you an idea of the shape and look.