A staple of permanent marker that writes well on just about anything. An economical and resource saving ink refill. Easy to separate and collect. 1 pack quantity: 6 pcs. Ink color: red, fine line, round core. Writing line width: 0.06 - 0.06 inches (1 - 1.5 mm). Ink: Oil based dye. Body length: 5.5 inches (139 mm). Shaft diameter: 0.6 inches (15.0 mm). Shaft material: Aluminum. 1 x Cute Animal Postcard