Description:DescriptionMade of high-quality plastic material. A simple plunger driven ink container refills easily to use liquid ink neatly and conveniently with your fountain pen.Liquid ink is smooth flowing, leaves a solid, confident line, and adds to the sophisticated experience of fountain pen use.Features-Material: Plastic.-Built with strong and durable material to withstand continuous use.- It has a simple design, but very practical in use, to bring much convenience to you.- Not easy to deform, it's convenient and durable.- The product design conforms to the ergonomic design, easy to install and use.- From the overall design and finish exquisite workmanship would be seen.Packing list100 x Pen Ink Sacs