Case of 6 Architecture Goldfaber Sketch Dual Faber-Castell Markers Alcohol-based markers with two tips. One brush type and one calibrated. The brush tip is soft and flexible, for variable areas and line widths, and the metal-coated fine liner tip (0.6) for contours and details. The ink dries quickly. You will be able to achieve depth and shadows due to repeated application of layers of color. Water and stain resistant. Made from 100% recycled material, so may show color variations due to production. Contains 6 gray markers, special for architectural design. Brand: Faber-Castell.