Asvine J16 Brushed Titanium Fountain Pen Jowo Broad Nib Piston Filling, Ink Window, Wrench & Box

Durable Material -- the pen was made from high-grade titanium. The superb titanium is well known for the extremely high durability and exceptional light weight.
Easy Flow and Write Smoothly -- Equipped with a Jowo broad nib, this pen offers an effortless and smooth writing experience.
Well-Balanced for Daily Writing -- The ergonomic titanium section has a no-slip design and ensure you have a comfort grip for long time writing.
High Ink Capacity --This writing instrument built-in piston filling system holds far more ink than a cartridge and lets you draw ink straight from the bottle, no converter required.
Easy Filling--Unscrew the knob, dip into ink, screw back the knob, and you done!
PS: when the piston doesn' t move, it means that it has reached its end. Twisting the knob forcibly will damage the piston system.