iPenstore Fountain Pen Ink Cartridge Filling Kit Refill your fountain pen ink cartridges with our 5 ml ink cartridge filling syringes. You'll receive two 5 ml capacity syringes with blunt tip 20 gauge tips that can be used to fill or empty fountain pen ink cartridges. The blunt tips are 1-1/2" long so you can pull ink from most ink bottles. Kit includes 2 reuseable filling syringes. Pack of 2 reuseable blunt tip syringes Use to fill empty ink cartridges from bottled ink Also useful to transfer ink from bottle to travel container Industrial grade syringes