Sarasa Clip 3C : Smooth, clear, Sarasa 3-color pen. One pen comes in three colors: black, red, and blue, with a knock mechanism Gel ink for a smooth, silky writing experience Water-based pigment ink with excellent water resistance Intense, vivid color without bleeding Can be used for official documents Sensitive Rubber Tip is designed for use with most touch screen devices. It also works as a cushion when retracting or extending the tip.