Fisher Space Pen, Millennium II Space Pen with Black Ink, Black Titanium Nitride (2010BTN-4) Writes at any angle, even in Zero Gravity. Simply the most versatile pen ever made. Writes in extreme temperatures from -30F to 250F Each Fisher Space Pen is precision assembled, hand tested, and carries an unconditional lifetime guarantee. You can write a continuous line over 30 miles long - which is enough to last the average person for 80 years. It's made of the finest quality materials in the USA. Featuring a special kind of ink which requires less to write smooth bold lines, a tungsten-carbide ball point that will last three lifetimes and a larger ink chamber to hold enough space pen ink to last you forever Writes at any angle, even in Zero Gravity. Simply the most versatile pen ever made Writes in extreme temperatures from -30F to 250F Each Fisher Space Pen is precision assembled, hand tested, and carries an unconditional lifetime guarantee You can write a continuous line over 30 miles long - which is enough to last the average person for 80 years. It's made of the finest quality materials in the USA Features a special kind of ink which requires less to write smooth bold lines