Staedtler Triangular Ball Pen

Ballpoint pen features an ergonomic triangular barrel that provides hours of comfortable writing. Glides smoothly and effortlessly over paper for maximum performance. Delivers approximately 3,000 yards of write-out. With airplane-safe ink, automatic pressure equalization prevents pen leakage while on the plane. Design also features a transparent barrel, and cap and clip that match the color of the ink. Acid-free indelible ink conforms to ISO 12757-2 to safeguard your documents with ink that cannot be removed. Nonrefillable.