TWSBI - CLASSIC
A body of the pen is made up of plastic. The nib is made up of steel. Screwed type mechanism. Piston filling mechanism [note: ink is not included]. This pen provides a large ink capacity. The pen has an ink window so you can see the level of the ink. The pen comes with an instruction manual.
The pen comes with a benchmark piston ink-filling mechanism and has all detachable parts. Similar length but slimmer than its sister pen, the Diamond 580. This fountain pen has a glossy black finish with an ink window and a stainless steel nib. It unscrews to open and the cap posts onto the barrel. The top of this Diamond 50 Inkwell is also interchangeable with the top of the TWSBI 70ml ink bottles.
TWSBI's belief is that it is important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen. These pens also come packaged with a wrench and silicone grease. Neither of these accessories is intended to be used immediately, as they are for long-term care and maintenance. Additionally, please use extra care if you choose to disassemble the nib and feed, as the feed is very fragile.
Warning :This pen should not be cleaned with any form of alcohol or acetone, or it will break down the plastic used in the pen.