100 Pieces Fountain Pen Ink Cartridges Black Color Ink Refill Cartridge with 3.4 mm Bore Diameter for School Student Writing Stationery Supplie

Ink cartridge length: 50mm; Cartridge outer diameter: 5mm; Bore diameter: 3.4mm. Suitable for most fountain pens. Please make sure your pen fits our ink according to the size information. Easy ink change without dirty hands. These ink cartridges are not erasable. Features: Ink cartridge length: 50mm; Cartridge outer diameter: 5mm; Bore diameter: 3.4mm. Suitable for most fountain pens. Please make sure your pen fits our ink according to the size information. Easy ink change without dirty hands. These ink cartridges are not erasable.

and even ink output, enjoy a writing experience. Suitable for , school, home use. Specifications: Ink Color: Dark BlueCelsiusBlackCelsiusRed(optional) Quantity: 50pcsCelsius100pcs(optional) Ink Cartridge Length: 50mm Capacity of Each Piece: 0.9ml Cartridge Outer Diameter: 5mm Cartridge Inner Diameter: 3.4mm Packing List: 100 * Ink Cartridges