Zebra F-301 Compact 27411 Ballpoint Pen, 0.7mm Fine, Black Ink. A cousin of the Original F-301, the F-301 Compact ballpoint pen also features a stainless steel barrel for long lasting performance, but with the added benefit of expansion and contraction for added portability. Expand to full-size for writing and contract, or collapse, the pen when not in use for simple storage.