Acrylic on 18"x24" heavy paper with a half inch border around entire piece. This is the fifth painting (hence V-the 5) in a series, all titled "The iunknown..." They are not "exact" in relation to each other but more similar-in tones,style, and an emotional link. It hasn't hurt that they have been popular-selling. All my work is certified by COA of authenticity. Painting is finished with two coats of UV protective gloss varnish.