Markers for whiteboards. Whiteboard marker, 4 mm, set of 4 in practical box, black, red, green, blue. With integrated sponge and magnetic holder. Conical tip with 4 mm line width. Can be wiped off dry. No drying out thanks to push-button system. Not refillable. Innovative and proven writing instruments for everyday use. Pentel was founded in 1946 as The Japan Stationary Corporation in war-torn Japan and initially concentrated on the production of watercolour and oil paints as well as drawing pencils for kindergartens and schools. The company's own research and development laboratory is responsible for numerous achievements in the world of writing and painting products. Examples include the first 0.9 mm fine lead for mechanical pencils, the first SignPen fibre-tip pen, the first Ball Pentel rollerball pen and the first correction fluid with a writing tip instead of a brush.