Stealth Markers loaded with transparent, near impossible to buff ink that goes on invisible but reacts and appears after exposure to sunlight.
The standard size marker with 15mm tip, refillable.
Stealth Marker Mini
A smaller pocket size marker with 15mm tip and is also refillable.
Stealth Calligraff Marker
A marker pen loaded with stealth ink the special chisel tip will produce lines of 1mm-4.6mm making this a great calligraphy pen.