Sought after by both artists and designers who aim to bring the life and 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 and 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 and ink are sold separately?order both). Pen Sub-Brand & Product Family: 3165 Series Rapidograph?; Pen Type: Technical Drawing Fountain Pen; Pen Style: Stick; Pen Tip Type: Needle.