Molotow GRAFX Aqua Ink Soft Liner Brush Pump Marker, Purple, 1 Each (727.010) Features a special water-based ink which produces vibrant color ideal for coloring and illustrating Soft edged 1mm brush nib perfect for watercolor techniques Flowmaster pump marker system has patented capillary technology Markers can be refilled with Molotow 693.410 Purple, 30ml bottle; Inks may be easily mixed to personalize colors Marker has an exchangeable nib which makes the marker a sustainable artist tool