Sought after by both artists & designers who aim to bring the life & immediacy that makes hand-drawn work so remarkable, 3165 Series Rapidograph Technical Drawing pens have been a favorite for generations. Superior-grade fountain-pen design delivers precise, uninterrupted line work that suits a number of specialized applications: from drafting architectural & engineering plans to inking comic books. Each pen features a 72D Series stainless steel nib. Color-coded cap indicates nib size. Easy-to-fill ink reservoir (pen & ink are sold separatelyorder both). Pen Sub-Brand & Product Family: 3165 Series Rapidograph; Pen Type: Technical Drawing Fountain Pen; Pen Style: Stick; Pen Tip Type: Needle.