The fountain pen ink refills are suitable for most fountain pens. Perfect for business writing, journaling, sketching, meetings, and any other occasions where a pen is needed. It can help you take notes and mark. It is a good choice for daily use, office, restaurant, hotel, and other occasions.

Specifications:
Material: Plastic; Ink Color:Red
Ink Refill Size: 5 x 0.7cm / 1.97 x 0.28 inch ( L * Dia )
Inner Diameter: 3.4mm
Packing List: 30 x Fountain Pen Ink Cartridges

Advantages:
The smooth, quick-drying ink in these ink cartridges prevents smudging, ensuring clear writing and giving you a smooth writing experience. The plastic shell is sturdy and shatter-resistant, which can effectively protect the ink inside. Ensure long-term use.
The ink is pH-neutral, which can protect your pen and ensure safe daily use.

Instruction:
For installation, remove the pen cap, pen barrel, and ink converter. Gently align the narrow end of the ink with the pen tip and press firmly until you hear a click. Once installed, gently shake the pen to promote ink flow and start writing smoothly.

NOTE
Please confirm whether it is suitable for your pen before purchasing, as they may not be suitable for all standard sizes.