The product is a set of 15 blue Parker Quink Ink Fountain Pen cartridges, divided into three packs of five. These refill cartridges are made of plastic and are designed specifically for Parker fountain pens. The ink color is blue, providing a smooth and consistent writing experience. Made in the United Kingdom, these cartridges are a reliable and high-quality option for pen enthusiasts looking to replenish their fountain pen with genuine Parker ink.