Dupla ArtGraf drawing tool for pencils Dupla is a connection system for drawing with two pencils at the same time. It was born from a study of materialization of alternative concepts and approaches to drawing. You can draw with different pencils, make varied strokes or even use it to make circles "Una", "Dupla", "Nora" and " Ponta" are the result of a project by students of the Master in Design at ESAD-CR. Dimensions: 19.5 x 7.5 cm. Contains 1 unit. li> Brand: ArtGraf.