***ISO 9001 & 14001 Certified, plus tested for quality and certified by the International Imaging Technology Council** This replacement DR720 Drum unit is guaranteed to perform with your Brother laser printer. This is an alternative to a genuine Brother DR720 Drum unit. The use of remanufactured or compatible replacement laser toner cartridges and supplies does not void your printer's warranty. We offer a 100% quality satisfaction guarantee on all of our items! Here, at HouseofToners.com, our large selection of Brother ink and toner cartridges are guaranteed to work just as good as their OEM replacements, for only a fraction of the cost! We also offer FLAT RATE $3.95 on every order that ships within the contiguous US and have a 1 year return policy! We want YOU to save money and feel confident every time you purchase from HouseofToners.com!