Zig Memory System Calligraphy Dual Tip Marker, Carded, Spring Green Marker features a dual tip with 2.0mm narrow and 5.0mm broad ends Double tipped, one end has a 5.0mm square tip while the other has a 2.0mm square tip An exciting marker which opens up new possibilities in the art of fine handwriting Water-based ink that will not bleed and is photo-safe and waterproof Archival quality, lightfast, acid free