Refills for Zebra SARASA 3 Color PenThe Limited Edition Zebra SARASA 3 Color Pen is refillable with the JK refill ink. Effortless, smooth writing: The Sarasa 3C pen is designed to provide an exceptionally smooth writing experience. Vibrant Sarasa pigment ink and fine tips ensure smooth, precise lines every time you write. Refill inks come in 0. 4 mm and 0. 5 mm, in black and red. Refill Details Refill JK 0. 4 and JK 0. 5 Ink colors: Red or Black Choose 0. 4mm or 0. 5mm point Smooth gel