Fisher Space Pen Military Cap-O-Matic Space Pen with Chrome Clip/Nose Tip, Carded, Matte Black (SM4BCT) 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