The Copic Classic empty marker is a versatile double-ended refillable marker that can be used with hundreds of colors of ink. The original COPIC marker, it is ideal for calligraphy, airbrushing and graphic arts applications. The square, rounded-edge barrel features a broad nib on one end offering smooth, consistent coverage for large areas, while the fine nib on the other end allows for easy detail work. Both nibs are replaceable. Details:Dual tip (broad chisel and fine point nibs)Dries acid freePermanent and nontoxicCompatible with the Copic airbrush system