The Doubleheader Calligraphy Marker makes creating exquisite lettering on envelopes and scrapbooks easy. With a broad chisel tip on one end and a fine chisel tip on the other, make bold, distinctive lines or small, intricate designs! Broad tip measures 3mm and fine tip is 1.5mm. Six colors include black, blue, green, pink, purple and red. Acid-free ink. Non-waterproof.