FeaturesJumbo marker based on our best selling N50 permanent markerPolyester felt chisel tip retains its shapeWill write on almost any surface including cardboard, metal, wood, plastic and glassTip size from 17mm to 19mm gives a variable line widthPack of 6 black inkPentel N50XL chisel tip permanent marker. The UK\'s favourite permanent marker. Robust aluminium barrel. Bonded fibre tip retains its shape. Will write on almost any surface, including cardboard, metal, wood, rubber, plastic and glass. Approx. linewidth 17.0mm - 9.0mm. Unlike most markers, which are alcohol-based, the Pentel Jumbo Chisel Tip Permanent Marker (Box of 6) contains heavy-duty solvent-based ink, ideal for serious industrial use. Will write on wet or greasy surfaces where other markers fail, drying instantly and permanently.