The Edding 141F Acetate Pen is engineered with permanent ink for professional and technical drawings. Its 0.6 mm fine tip delivers precise, sharp lines ideal for detailed work and technical applications. The green color provides excellent contrast in schematics, graphics, and architectural drawings. The permanent ink ensures long-lasting performance on paper, acetate, PVC, and other synthetic surfaces. The F series allows controlled precision even with light pressure. Trusted by engineers, architects, and designers, Edding offers technical accuracy and reliability that sets the standard for professional drafting.