This is a reversible wand tip modification for the Hasbro Neutrona Wand. Simply press the printed part over the existing tip. The fit is very snug, so it shouldn't fly off during normal use.

I've tested it on both the Spengler wand and the 1984 wand (pictured). It works on both, but it does seem to have a better fit on the 1984 version.

The part attaches using a lip that catches the underside of the opening in the existing tip. To remove, use a plastic pry tool and wedge is under this lip. The part should pop off easily.