Nuln Oil is a Citadel Shade.Citadel Shades are specially formulated to flow over other paints and into the recesses on your miniatures defining details and accentuating recesses. Once applied they dry to provide a very effective matte shading for your models.This pot contains 12ml of Nuln Oil one of 12 Shades in the Citadel Paint range. As with all of our paints it is a non-toxic water-based acrylic paint designed for use on plastic metal and resin Citadel miniatures.