Wing Sung 3013 Vacuum Negative Pressure Fountain Pen Resin Transparent Ink Pen EF/F Nib 0.38/0.5mm Fountain Pen  Description: Feature： 1.Easy Filling System - Simply untwist the end , pull up then push down. Ink is filled, then the end back 2.Clear Barrel - The clear body is really cool, you can show off your ink choice, or just get a handy indicator of when you need a refill. 3.Large Ink Capacity - Once filled, it hold a lot of ink, and with its smooth pay out it'll take forever to run out. 4.High Quality - Made of super quality resin, the pen grip is ultra-light and super smooth. Giving you a cheerful writing experience. 5.Classic Style - Fashion and exquisite design ,beautiful resin barrel brings a new style pens which meets your visual aesthetic. Specifications: Filling System: Piston Vaccum Pen : Screw type Nib: Extra Fine Nib Ink: bottled ink Capped length:140mm Diameter:13mm Package Included: 1X Fountain Pens (NOT included Bottled ink)