Achieve controlled, consistent, smooth fluid lines for drawing, writing, illustration, and crafting with this Studio Series Micro-Line Pen Set! Includes six different pens with black pigment ink in a convenient reusable storage case. Set includes: 6 fine-line pens Sizes: 005, 01, 02, 03, 04, 05 Archival-quality black pigment ink Waterproof Fade-proof No bleed-through Transparent case measures 4 inches wide by 7 inches high