This universal felt pen is great for adding fine detail in the same colour as you are airbrushing. Like a felt-tip pen, the tips soak up liquid colour so you can write, paint and draw as required. Simply dip the tip into your airbrush colour to match up the exact colour used on your work. It’s a good idea to keep a tip for each colour.Includes 10 tips and Replacement Tips are also available in packs of 10.