BK77 is the original, Superior Superb ballpoint pen. Clear barrel and Black ink, its oil-based ink delivers precise, yet smooth writing perfect for every day usage. It's also suitable for detailed figure work, shorthand and note taking. It has a 0.7mm tip which gives approximately 0.25mm line width. Each time the cap is replaced the pen tip is cleaned. With an attractive slimline barrel the Superb ballpoint pen lives up to its name.