The Staedtler 441 Concrete Ballpoint Pen features a durable construction made using hand-cast high-performance concrete, resulting in a unique finish

• Oil-based so it flows smoothly and produces a vibrant result on the page

• Features a retractable nib and a built-in pocket clip so you'll be able to keep it handy when you're on the go

• Perfectly balanced weight distribution

• Barrel made of high-performance concrete

• Special, hexagonal design

• With push mechanism

• Round concrete push-button on top

• Metal tip, clip and push button

• With replaceable Staedtler jumbo ballpoint medium black refill