"Juice Up" is a higher-grade colorful ultra-fine gel ink ballpoint pen that realizes a new sense of deep and smooth writing comfort. Since it has a Retractor indicator, you can see at a glance whether the retractor is on or off ! Pastel and metallic colors can be written on black paper or dark paper. Size : Maximum diameter φ 0.41 in, total length 5.62 in Pen tip : 0.4 mm (ultra-fine) Method : Retractable Ink : Water-based pigment gel ink. The solid black with elegant Pink Gold-accented tip and clip looks luxurious. Sensitive Rubber Tip is designed for use with most touch screen devices. I also works as a cushion when retracting or extending the tip. Beautiful looking Blue Black ink.