HP has released the HP SD367AE twin pack in order to help you save time and money with one simple purchase. The HP SD367AE twin pack contains one black HP 21 ink cartridge and one colour HP 22 ink cartridge which is everything you need to get started. Combining the HP 21 ink cartridge and the HP 22 ink cartridge into one single pack is quite useful as it provides the full range of colour that you would need to create a full colour document and so cuts the time you have to take to find the HP 21 and HP 22 ink cartridges separately. Installing the HP21 and HP22 ink cartridges is easy and quick which cuts your downtime in half and increases the efficiency your printer works at, insuring your prints are high quality and professional. The HP 21 HP 22 ink cartridge twin pack contains the HP21 and HP22 ink cartridges, yet is cheaper than buying the cartridges individually, which makes it the more economical choice and helps you to save money.