Water-based paint marker, suitable for use on all materials 8 pen pack containing black, blue, red, green, white, yellow, pink and violet - every colour you need to get started! Tip size: 1MR - the precise and calibrated tip produces refined lines For indoor and outdoor use Stable pigments with strong UV resistance and quick drying Permanent on porous surfaces and erasable on most smooth non-porous materials, your creations can be protected with a fixative varnish. The features of the pen include a washable tip. This pen is also water soluble and can be mixed and layered as desired. To find out more about POSCA, head to our blog. Permanent on porous surfaces and erasable on most smooth non-porous materials, your creations can be protected with a fixative varnish. The features of the pen include a washable tip. This pen is also water soluble and can be mixed and layered as desired. These pens are the perfect way to explore your creative side! To find out more about POSCA, head to our blog.