The first Uni-Ball pen, a metal-tipped roller pen with water-based ink, was developed in 1979 by Mitsubishi Pencil Company and became an instant hit. Other innovative pens followed, including the Uni-Ball Eye rollerball and retractable gel ink pens, all of which helped to cement Uni-Ball’s popularity thanks to their high quality and writing performance. The Uni-Ball range at Officeworks include rollerball pens, gel pens, ballpoint pens, refills and more.