Platinum Platinum Ink Cartridge For Fountain Pen-2 Cartridge in One Pack Ink Cartridge

Platinum ink cartridges are made specifically for use in Fountain Pen Lovers.Platinum ink cartridges are top quality.A stainless steel ball holds the ink from coming out until the cartridge is pushed into the back of the gripping section of your fountain pen. This serves a second purpose which helps meter the ink flow when the cartridge is opened and allows for priming when the pen is shaken.