This uni posca pc-8k poster marker has water-based pigments which can be blended when wet or overlaid when dry. They have a chisel tip which can produce thin lines on the point and thick, 8.0 Mm lines on the side. The ink produces opaque results that won't fade over time. This marker has a chisel nib which lets you draw both fine lines on the point and thick, 8.0 Mm lines on the side. You can blend these markers when they are wet or overlay them when they are dry. The pigment ink is fade proof and opaque. The pens have a round, easy to grip barrel. This marker has pink ink.