[Black]

50 Piece Refill Smooth Cartridge for Pen 3.4 mm Bore Diameter Black/Blue/Black Blue/Red for Student School replaceable pen cartridgesFeatures:1.Large Pack and Saving Money. 1 pack of 50 pieces refill inks, 3.4 mm bore diameter ( for fountain pens take 3.4mm cartridges Notice: These cartridges are not Standard Size.2.Universal and Multipple Choice. Refill Length is about 50mm/1.79in; Cartridge Diameter is about 5mm; bore diameter 3.4mm. 4 kinds of color for you to choose, including black, blue, red, black blue. For daily home, office, school use.3.Smooth and Quick Dry. With no break in flow, you can enjoy a smooth and optimal writing experience as your fountain pen glides elegantly across paper.4.Safe and Non-toixc. The has been carefully manufactured using only natural dyes giving the composition a neutral, natural, and 5.Durable and Practical. for Ideal for students, school, office use.Specifications:Material: Plastic+InkBore Diameter: 3.4mmColor: Black, Blue, Black Blue, RedSize: Approx. 50x8mm/1.97x0.31inWeight: Approx. 91gPackage Includes:50 Piece Refill Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!