You get 3 full sized markers.
Invisible marker pen with uv light.
Invisible ink pens uv light black light magic highlighter secret message 12 pack.
Then put the cartridge into the front part.
Put the cap on.
These invisible uv ink markers by directglow are completely invisible in normal light and glow incredibly bright in uv blacklight.
To view look at with uv light.
Mar c0 invisible blue all purpose uv pen can be used for marking almost any type of substrate with an invisible permanent highly fluorescent uv tag for identification and tracing.
Push the front piece onto the back piece.
Uv light pen invisible ink secret marker pen with ultra violet led black light.
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Start with marker tip and slide it back into place.
Easily identify and claim all of your property when it s marked with this invisible permanent ink viewable only with uv light like the included blacklight so you can scan for your belongings in an instant provides ultimate versatility by permanently writing on most materials where other products would have wiped off.
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The invisible ink pens are very popular around people which can create a lot of fun.
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Invisible ink spy pen with built in uv light magic secret message gadget us ship.
If you can see the marker when you write then you need to squeeze more ink out of it.
To use write with it.
Children think that they are secret agents with these pens lay mystery adventures and writing clues for each other.
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The pen can be used in conjunction with our supertac 395 hand held or minizoom 395 battery operated black lights to have a portable security system.
1pc invisible ink spy pen with built in uv light magic marker for drawing kids.