This pen casing is RAW UNFINISHED BRASS. Over time, each pen will develop a unique patina as it responds to the environment, owner's body chemistry, and the way they handle their pen. It can always be polished to restore its original look.

Any engraving will appear very subtle.

The cap for this exciting Space Pen model is an actual .375 H&H magnum shell. Inside is a raw brass bullet Space Pen. What a special gift for the hunter or outdoors enthusiast!

We recommend you never fly with your .375 Cartridge Space Pen. TSA sometimes won't believe it's a writing instrument!

When closed, Cartridge Space Pens are the perfect size to carry in your wallet, pocket, purse, car glove box, organizer, or toolbox. When open, it's a full sized, evenly balanced writing instrument.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.