Each pen is individually handcrafted and begins as a single metal rod. I meticulously craft them into the final shape on a manual lathe. I've designed them to be as simple as possible - there are only 6 parts in each pen. Custom etching of a special name or date - fill in the personalization form or message me about additional font style options! Each pen will ship with one of my favorite fine tip gel cartridges installed - the Pentel Energel 0.4mm needle point or the Pilot G2 0.7mm. Two styles of ink refill are available: - Pilot G2 - features a slightly larger opening to accommodate the Pilot G2 tip - Pentel Energel - features a smaller opening that is also compatible with many other refills (Sakura Ballsign Knock, Zebra Sarasa Dry and others) The mechanism is simple and secure: carry confidently in your pocket or purse and never worry about an accidental ink stain. If you'd like a different color or size of ink than the standard black, let me know and I'd love to help you find the right one! Enter your personalized text below, or if you're looking to add a logo or an additional customization, send me a message with what you have in mind! Dimensions 8mm x 142.5mm (5/16” x 5.6”) 12.3 g (0.43 oz) - Aluminum 31.75 g (1.12 oz) - Brass 34 g (1.2 oz) - Copper Please note: The raw brushed finish on the brass and copper will allow a natural patina to immediately develop that is truly unique to you. How you carry, fidget, and write with it will all affect its development