STAEDTLER triplus ball 437

Triangular ballpoint pen • Ergonomic triangular shape for relaxed and easy writing • Ideal for everyday writing • Particularly smooth writing performance • Airplane-safe - automatic pressure equalization prevents pen from leaking on board aircraft • Conical metal tip • Smooth writing with fast drying ink, without smudge of markings • Ventilated cap conforming to ISO 11540 and BS 7272-1/2