Your printer needs ink cartridges. With the deep black color in the HP 305 cartridges, you can print bright colors and sharp letters. These HP original cartridges are made of recycled plastic and can be recycled again. The cartridges from the HP 305 series are suitable for the HP Deskjet, HP Deskjet Plus, HP Envy, and HP Envy Pro models. Check in advance if your specific printer is suitable.