Copic Sketch Markers are the perfect markers for beginners, students and hobby artists. The replaceable Super Brush nib acts like a paintbrush in both feel and application. There are also 9 other tip sizes available, which you can purchase separately.The Sketch markers utilize permanent, non-toxic, alcohol-based ink and are also compatible with the Copic Airbrush System.Features & Benefits72 High Quality Markers stored in a plastic case for easy useDual-tip designSingle ended pen including: Super Brush nib Nibs are interchangeable and replaceableFull colour spectrumRefillable - one bottle of ink will fill a marker up to 13 timesCrafted with the artist in mind