Ideal for graphics and illustrations, this set of 40 Pentel Studio Fibre Tip Pens will provide you with wide variety of colours to choose from.With an assortment of colours and five highlighter pens, this professional quality set is made with vivid, water based ink and features a durable fine tip, creating a line width of approximately 1mm.. Set consists of 40 fibre tip pens. Assortment of colours and 5 highlighter pens. Professional quality fine point colour marker with durable fine tip . Vivid, water based (dye) ink colours . Ideal for graphics and illustrations . Approx. line width 1.0mm. Approximate dimensions (mm) H175 W235 D25. Weight 455G