HP 643 LaserJet Printing Supplies provide fast, easy, brilliant results. HP ColorSphere toner is tuned with the printing system to optimise quality and reliability for higher productivity and lower printing costs. HP 643 LaserJet Printing Supplies with HP ColorSphere Toner provide fast, easy, brilliant colours. Improved gloss enables your HP colour LaserJet printing system to produce a dynamic range of bright, brilliant and more intense colour. Quick, easy, more productive. HP ColorSphere toner enables fast, high-quality printing. HP Smart technology in HP supplies interacts with the printer to consolidate needed supplies into a single order. You choose the reseller and order online. HP 643 LaserJet Printing Supplies with HP Smart Printing Technology enable the cartridges and the printer to make continuous adjustments that optimise print quality and reliability - and provide a lower overall cost of printing.