The Schneider one change refillable rollerball pen includes 2 cartridge refills. It's like getting 2 pens in one! The ultra-smooth tip (.6mm) and ergonomically rubberized pen surface provide for a great writing experience. This pen features waterproof ink that is quick drying and smudge proof. The super-flow-system means consistent ink flow for easy writing. Uses refill one change 854 or 852 rollerball cartridges. Box of 5, Green ink.