These empty paint markers allow inks and other liquid media to be applied with precision across a variety of surfaces. Choose your medium, fill up and get creating! These empty markers can create unlimited individual colors through mixing and dilution and can also be filled with other mediums such as watercolor and calligraphy inks.Details:15 mmFlat nibIdeal for use with FW Acrylic InkLarge barrelCan be rinsed out and washed for re-useNote: Should not be used with FW Pearlescent inks. Additional nib sets are available for replacing the nibs in these reusable markers.