This gorgeous, smooth-writing rollerball is crafted from an acrylic designed to resemble Casein, a natural product used in the creation of pens 100 years ago. The alternating dark and white lines create a beautiful contrast with each other, yet augment the warm, gold finish with black accents on the dome, center band and finial. The cap posts on the barrel for those that like to change the pen's balance and overall weight. The pen uses a standard size rollerball refill that is widely available in any stationery store. This is a wonderful looking pen that would make a great gift.