APPLICATION: Use your favourite ballpen again and again! Replacement D1-refills (6,8 cm length) are convenient for multipens, mini-ballpens and multi-colour-pens. LONGLASTING: Each refill can write approx. 1.300 meters, this corresponds to 37 DIN A4-pages! HIGH QUALITY: Made in Switzerland, out of metal, medium width, smooth writing, documentary proof, water proof, stainless steel ball, ISO 12757-2 DOC CONTENT: The set contains 3 refills, writing colour black. Perfect for work, school, office or at home. ONLINE BRAND QUALITY: Online is a German company founded in 1991 and specialises in pens, calligraphy kits, pen cases and much more. Online offers high quality only!