Zebra's Eco Clip-On 3-Color Retractable Ballpoint Pen 0.7mm Black Dozen (26310) Made from recycled materials - 70% post-consumer waste Multi-colored ink lessens the need for 3 separate pens Push button retractable for easy storage Pocket clip attaches to binders, book, legal pads, pockets Refillable with Zebras SK-Refill