This pen symbolizes Asia’s appreciation of balanced harmony and the complementary yet opposing forces of the Yin and Yang (two balanced yet opposing aspects of any one phenomenon). The pen is symmetrical and was designed not only as a beautiful object but also one of improved stability. The body's center of gravity makes it very ergonomic to write with. In addition, a special silicon rubber was adopted for both the grip and cap area to improve the durability of this pen. Pen features a rolling ring in the middle that can scroll through all 26 letters of the alphabet so that you can personalize the pen with your initial. Six body colors are available including aqua blue, cherry pink, happy pink, mint green, snow white and vitamin orange. Don't forget to be environmentally friendly and buy refills! Each pen writes in black ink, but black, green, blue, pink, and red ink refills are also available.