Experience consistent, fluid writing with uni-ball Vision Elite Rollerball pens. Ideal for business travelers, these rollerball pens are designed to be airplane-safe and won’t leak in flight. They feature the innovative uni-Flow Ink System that creates a steady flow of water-resistant ink for smooth, consistent writing. Refillable: 61233PP & 61234PP. Pen Type: Roller Ball Pen; Pen Style: Stick; Refillable: Refillable; Special Ink Type: Waterproof.