Won't dry out leave cap off up to 1/2 hour! Bold marking, permanent ink provides high visibility. Marks on virtually any surface, including cardboard, metal, and plastic. Quick drying; water and rub resistant. Durable chisel tip marks in a variety of widths. Low odor. Safe for office, school, or home. Value Pack-Stock Up and Save! Marker Ink Type: Permanent; Marker Tip Type: Chisel; Marker Tip Size (text): Broad; Marker Tip Size (numeric): 4.8 mm.