Vintage Sensa Pressurized Pen Refill Black Medium NASA Tech Fisher Space USA NOS

New old stock Sensa Pressurized Pen refill in black medium point, still sealed in original packaging. This genuine Fisher Space Pen manufactured refill is designed for use in Sensa pens, but also features NASA space mission tech that writes under nearly any condition: underwater, upside down, over photographs, in extreme weather, and for 3.5 miles of continuous use. Packaging lists multiple refill colors offered, though this one is black medium. Made in the USA. Card shows some light shelf wear from age, but refill itself is new, sealed, and unused. Great collectible writing supply for fans of vintage pens, space pen technology, or anyone who wants a refill that won’t quit when it matters most. Hard-to-find refill that stands out from standard cartridges. Open to offers — the cool kind, not the insulting kind.