Features 1、Multi Purpose: Fineliner pens can be used for detail painting, artistic painting, line drawing, sketching and writing for architects, designers, illustrators and sketch artists. 2、Quick Dry: Waterproof micro line pens are quick dry, waterproof, colorfast, perfect for construction, animation, writing, engines, bible study, detailing, and more. 3、Archival Ink: Micro line pens use PIGA archival grade ink, suitable for acid free environments, safe, waterproof, acid free, long lasting bright, will not fade, bleed. 4、Enough Quantity: There are a total of 12 micro pens, which are numerous and can meet your daily needs, and are stored in a plastic box for easy access 5、Widely Applicable: The line drawing pen can be used for writing, sketching and drawing, it does not penetrate the paper and can achieve excellent line quality. Specification Item Type: Micro Line Pens Product Material: PIGA Ink, Plastic Product Application:For Drawing, Writing, Product Design, Architectural Design, Etc. Package List 12 x Micro Line Pens