Zebra Clickart Retractable Felt Tip Markers feature a capless design and a new ink technology that absorbs the moisture in the air, which keeps the ink from drying out. The pens have a 6 mm bullet point tip. They can be blended with water for watercolor techniques, but will not bleed through paper when writing. The Zebra Clickart is perfect for journaling, color coding, drawing and everyday writing. Available in a complete color collection of 36 pens.