The Pentel RSVP RT ballpoint pen is a sturdy, well-balanced pen. This retractable pen is designed for extended periods of use. The exclusive Comfort Zone, latex-free grip is designed to reduce writing fatigue. The durable stainless steel tip delivers a consistent line without skipping. The 1. 0mm tip writes medium lines. The transparent barrel allows you to see the ink supply and the longer barrel design holds more ink than the competition - allowing you to write for almost a mile! Uses the BKL10 refill, which is available in a variety of colors. All RSVP RT pens include Pentel's Limited Lifetime .