Spectra AD Markers are an alcohol-based twin tip marker that features brilliant color with less odor than the traditional AD Marker. Painstakingly developed over several years, Spectra ADMarkers were designed tip to tip, inside and out, with the artist in mind. Each air-tightcap closely matches the marker’s ink, the barrel is ergonomically shaped and prevents rolling, ink capacityallows for maximum draw out, and the twin nibs offer the artist a wide range of line options in one marker.Spectra AD Markers are refillable.
This basic set includes

014 Canary
005 Red
034 Violet
038 Ultramarine
067 Bright Green
020 Black