2Pack Twin-Tip Permanent Marker, Pen Size:15.5cm Permanent marker has these features:1.Smooth writing2.Fast drying and permanent3.Non-toxic,environmentally safe4.Good quality5.Suitable drawing for most surface6.Permanent on most surfaces:paper,wood,fibre,etc7.Customized logo and packing design are welcome. We will give you good quality and best price, welcome to contact us!