Giotto turbo giant broad tip marker pens giotto 4254 giotto turbo giant marker pens are high quality italian markers and are supplied in radiant non toxic colours these water based ink markers are ideal for all school projects art and colouring the markers have long lasting 2 8mm nibs along with child safe ventilated caps any marker ink on the skin can easily be removed with soap and water giotto giant broad tip marker pen school pack of 144