You can use this Edding EcoLine 31 red flipchart marker for writing and drawing on flipchart paper, presentation boards, cards and more. It has a round tip with a writing thickness of 1.5mm - 3mm. The ink has a neutral odour and does not mark underlying sheets. Forgot to put the cap back on? Don't worry, this red flipchart marker won't dry out. The exterior consists of 90% recycled plastic and the ink is easily refillable. This makes this marker an environmentally friendly choice for your presentation board.