The Army Painter, Warpaints: Air Cosmic Dust (18ml). 

All Warpaints Air are pre-mixed and airbrush-ready right out of the bottle and made from ultra-filtered vibrant pigment. The Warpaints Air range has been developed in a unique and innovative Triad System - each matching Warpaints Acrylics colour has a corresponding Base and Highlight color. This makes highlighting and zenithal shading a breeze and army painting even faster and more cohesive. To make things easier Warpaints Air comes pre-loaded with two steel Mixing Balls.