Ranvi 50 Pieces Black Ink Sacs, 3.4 mm bore ink cartridge

• Abundant quantity: the package comes with 50 pieces pen ink Sacs, enough for your daily using or replacing, you can also use them as backup, they will meet your various needs.
• Lenght : Appr 51mm , Cartridge Diameter : Appr5mm, Bore diameter : 3.4mm,Please check if the size matches the one you need before buying.
• Fast and easy to use: these pen ink Sacs are simple for you to apply and use, you need to disassemble your pen, insert your cartridge and then press firmly; The pen refills are also easy to carry and store.
• Nice writing experience: our fountain pen ink slides on the paper smoothly and is unobstructed, and the ink needs to dry in a few seconds, so the handwriting is not easily stained when you write or draw.
• Suitable occasions: the fountain pen refills are suitable for schools, office, homes, meeting, they can also be applied for making cards, writing letters, making plans or list, they are ideal for beginners or experienced people handwriting

50 Pieces pen ink Sacs fountain pen refill pens standard size Sacs with 3.4 mm bore diameter for calligraphy pen fine writing Features: Smooth ink flow: Our fountain pen refill slides on the paper smoothly and is unobstructed, and the ink needs to dry in a few seconds, so the handwriting is not easily stained when you write or draw. Practical gift idea: You can present this fountain pen ink to yourself, or you can also send to your sisters, brothers, relatives, colleagues as a gift at Thanksgiving Day, birthday, graduation, family gathering, holiday or other occasions. Specifications: Material: plastic, ink Size: approx. 2 inches/ 5.1 cm in the length Bore diameter: 3.4 mm Ink color: black Package Included: 50 x Pen ink Sacs Note: Please check if the size matches the one you need before buying. 1.Align the ink sac finely with the bayonet and press firmly until you hear a click. 2. After installation, leave the pen upright for one minute to write.