These carbon pencils include a rich black lead which provides an ultra smooth and consistent stroke. The ease of use, blending or shading make these pencils a delight to use. Viarco is a family owned business located in northern Portugal that has been making premium artist drawing materials since 1907. They have developed unique blends of graphite, carbon and binders to produce some of the highest quality sketching materials available today. Includes 2 carbon pencils