The product is a set of four Genuine Tektronix ColorStix Yellow, Cyan, Magenta, and Black Phaser 380 ink cartridges. These solid ink cartridges are specifically designed for use with Tektronix 380 printers, providing vibrant and consistent color for your printing needs. Each box contains one cartridge of each color, making it easy to ensure a balanced and accurate color palette for your documents and images.