Fisher Space Pen Shuttle Retractable Space Pen - Gold Grid Design 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 and hand tested in the USA. Each carries an unconditional lifetime guarantee. All Brass and steel construction Each Fisher Space Pen is precision assembled, hand tested, and carries a lifetime guarantee against all manufacturing defects