The Pentel Arts Tradio Stylo is a porous point sketch pen with unique qualities. A flexible plastic nib creates a variety of line widths, depending on the angle and pressure applied. Black water-based dye ink dries fast making it ideal for sketching. The free-flowing system delivers a consistent flow for smooth, effortless writing from the first stroke to the last. The ergonomic barrel design provides added comfort and control. Refill with Pentel Black ink MLJ20.