Staedtler 430 Ballpoint Pen Medium Black Ink Dispenser Box Of 100Staedtler 430 Ballpoint Pen Medium Black Ink Dispenser Box of 100 Features Metal tip, ventilated cap and comfortable hexagonal grip. Contains smooth flow low viscosity writing ink that dries immediately and can write up to more than 3,200 metres for medium and 4,200 metres for fine. Airplane Safe automatic pressure equalisation prevents pen from leaking onbaord aircraft Also available in boxes of 10 and cups of 50 (medium assorted and medium blue,