HP 51644Y. No 44. Inkjet Print Cartridge yellow 42ml. For Designjet 350C/430/450C/ 455CA/488CA/750C/750C+/ 755CM. 840 page life. The HP No.44 Yellow Inkjet Cartridge is the perfect product for ensuring that your machine is working at its best possible level. HP consumables are developed in close proximity to HP machines, ensuring that they work together without any problems, achieving quality prints with every use. With a yield of approximately 840 pages, you don't have to worry about constantly switching cartridges, saving you both time and energy.