The Brother HL-621 laser toner from LD Products is a 100% brand new compatible laser toner that is Guaranteed to meet or exceed the print quality of the OEM Brother HL-621 toner cartridge. Purchasing our Brother HL645 Plus laser toner is an excellent way to save money without sacrificing quality. Our Brother HL645 Plus laser toner cartridge has a '100% Satisfaction Guarantee'. The use of our compatible laser toner for the Brother HL-621 does not void your printer's warranty. OEM (Original Equipment Manufacturer) laser toner cartridges are also available for your Brother HL-621.