Original HP C9733A magenta toner cartridges have been manufactured from the word go by Hewlett Packard to ensure the very highest quality prints. With an enormous estimated yield of 12,000 per cartridge the HP 645A is a cost effective way of running your printer using original HP products.Compatible with nearly a dozen different top quality printers including the HP Colour LaserJet 5550dtn. The price you see here for the C9733A original HP toner cartridge includes VAT and our fast free delivery service.