This is a listing for one ''Pharos'' Titanium Pen, with one pre-installed Tritium Isotope, 3mm x 22.5mm removable vial (colors available: green and ice-blue).
 
The ''Pharos'' Pen is made of polished titanium metal, available in two pen bolt finishes (stonewashed and polished) and uses a high quality, black ink, Fisher Space Pen Refill (included). Thanks to the Fisher refill, the pen can write in water, upside-down or even in space, no gravity needed!
The tritium vial keeps the pen easy to locate at all times, making it also a great conversation piece.
 
The pen bolt, is used to deploy the pen tip and retract the tritium vial. The bolt button is also used as a design safety feature; when open, you can't use the pen clip and prevents the pen tip from damaging a shirt pocket by accident. The pen can be easily disassembled and both the pen refill and tritium vial can be replaced when needed.
 
What you get with every ''Pharos'' Pen Order:
> 1 x ''Pharos'' Titanium Pen (1 x Fisher refill + 1 x Tritium vial if selected)
> 1 x Leather protective pen sleeve

''Pharos'' Titanium Pen Specs
Pen length: 144mm
Pen body width:11mm (bolt button/pen clip excluded) / 16mm (bolt button/pen clip included)
Pen weight 37 gr

Tritium (symbol T or 3H, also known as hydrogen-3) is a radioactive isotope of hydrogen and one of the most valuable substances on earth, with a market price of 30.000$ per gram.
The Tritium vials used are light sources of gaseous tritium isotope, hermetically sealed in glass.
This radioactive tritium gas, glows completely on its own in a very safe manner, without needing to be 'charged' with light as required by most phosphorescent glow in the dark products. The glow will be subtle and visible in low-light conditions; the darker the better. It will not be visible in daylight or well-lit areas. The light produced is literally ''on'' at all times, it's intensity isn't reduced after a few hours and will last non-stop for about 20 years. This is truly a ''nuclear powered'' pen!