Say hello to the newest addition to the SketchBox Signature line! The September 2018 Premium box features four of our new SketchBox Signature color brushes. Each brush comes pre-filled with vibrant water-based ink. We've included black, red, light blue, and purple. We've also included a Maribu Graphix Aqua pen in aqua green, a Niji 12mm medium waterbrush, and a Faber-Castell PITT soft brush in dark indigo. Photo thanks to @karma.go.