Nuvo Aqua Flow Pens are uniquely designed to create a watercolour effect without the hassle and mess. These highly pigmented water-based pens leave you with a bright vibrant finish. The perfectly formed watercolour brush nib makes the pens extremely versatile and is perfect for adding small deatil or colour washing large areas.Each pen has its own reservoir complete with a non drip valve. Apply different pressures to the reservoir to control the amount of liquid released.Colours include: Apple Red lemon Zest Aqua Splash