The Kaweco Supra Brass Fountain Pen is a versatile writing instrument that combines classic design with modern functionality. Crafted from solid, untreated brass, this pen develops a unique patina over time, adding character with each use. Its modular design allows for adjustable length: with the included 3 cm extender, it transforms into a full-sized pen suitable for desk use; without it, it becomes a compact, pocket-friendly option.