Educational Colours Master Mega Markers are perfect for young artists featuring jumbo barrels that are easy to hold. These washable Master Mega Markers are safe for children with non-toxic, water-based ink and child safe ventilation caps. They markers feature broad tapered tips for both bold strokes or fine lines. The Master Mega Markers feature 5.8mm sink-resistant nibs that are engineered to sustain heavy pressure when colouring. 12 vibrant colours in the range. Perfect for the young aspiring artist to express their imagination!