The Twin Black Marker set by ZIG is a must-have set for anyone who enjoys hand lettering, calligraphy, or embellishing their pages with fun designs. This 4 pack of dual-tipped markers provides 7 different tip variations in different sizes that can be stored compactly and easily taken along. An ideal set that provides endless options in just 4 markers! Water-based pigment ink that is odorless, archival-quality, and acid-free.