Durable Material-- All parts are from high-grade titanium and acrylic. The superb titanium is well known for the extremely high durability and exceptional light weight. 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 -- The pen's built-in vacuum filling system holds far more ink than a cartridge and lets you draw ink straight from the bottle, no converter required! Easy Flow and Write Smoothly --Equipped with a hand-polished stainless steel nib and quality feed system to ensure you write effortlessly on any type of paper. Easy Filling- Simply untwist the end cap, pull up the vacuum rod then push down, ink is filled. To use the pen for longer, unscrew the vacuum knob a few turns to let ink flow from the barrel to the nib. The pen was presented with elegant Asvine gift box, wrench and instruction manual to makes an amazing gift on any occasion like birthday, party or any anniversaries of important events. Specification: Nib: Asvine M Pen Cap: Screw type Material: Titanium and acrylic Filling Method: Vacuum filling for bottled ink Capped Pen length: 145mm, Posted Length: 155mm Diameter: 13-15mm Weight: 37.5g