This SolaDirect Acrylic Paint Marker Pen is permanent and suitable for decorating and painting on a variety of surfaces including paper, cardboard, canvas, polystyrene, wood, leather, fabric, plastic, metal, and glass. The water-based acrylic paint is non-toxic and xylene-free, making it ideal for artists and general use. It is available in 22 vibrant colours. For use, shake well with the cap on and press the tip several times until the paint flows. Keep capped when not in use. The line thickness is 2.5 mm. This marker is suitable for professional, hobby, school, and home use for painting, decorating, sketching, and writing. Once dry, the paint is durable and non-washable.