- Use the HP Z820 Liquid Cooling Heatsink Module when you order a secondary processor for your HP Z820 if your first processor has HP Liquid Cooling
The HP Color LaserJet 3500/3550 Printing Supplies with Smart Printing Technology [p1] deliver a consistently outstanding colour print quality over the life of the cartridge. Advanced toner formulas deliver a broad range of vibrant colours and sharp text for professional results. HP LaserJet cartridges and the printer use an improved electro-photographic process to maintain accurate colour even in extreme conditions.
[p1] Using genuine HP supplies ensures availability of all HP printing features.