Perfect for drawing, writing, illustration, crafting, technical work, and more, this high-quality pen set includes 7 micro-line pens in 7 bold hues. Studio Series Micro-Line Color Pen Set includes pens in black, red, blue, green, purple, brown, and yellow. Precise .05 (.45mm) tips. Micro-pigmented inks create fine, consistent, fluid lines. Archival-quality pigment-based ink. Waterproof. Fade-proof. No bleed-through. Reusable transparent storage case keeps pens organized and safe on the go. Storage case measures 4-3/4'' wide x 7'' high.