4inkjets offers a set of 4 low-cost, high-quality replacement cartridges for the HP 307A toner series. The toners available in this set replace the original HP CE740A (307A black), CE741A (307A cyan), CE743A (307A magenta) and CE742A (307A yellow). Every remanufactured replacement toner for the HP 307A is guaranteed to perform flawlessly with your HP Printer. While most competitors simply refill the toner cartridge and hope the drum and other key components last, we fully disassemble the toner cartridge and rebuild it to ensure the highest quality prints. The use of LD remanufactured replacement laser toner cartridges and supplies does not void your printer's warranty. LD remanufactured laser cartridges are not remanufactured by HP. Each cartridge is fully Backed by a 2 year guarantee and ship fast!