This multi-pack of Brother original drum units goes under the part code of DR230CL and contains one each of the black, cyan, magenta and yellow drum units. The DR230 drum units are compatible with a variety of colour laser printers including the Brother HL-3070cw. This set of DR-230CL drum units is produced from scratch by Brother themselves to offer you the highest level of comparability and unrivalled print quality.The role of the DR230CL drum unit is to transfer the toner powder from the toner cartridges onto the page, having four separate drum units allows extended use, which stand alone cartridges which include the drum unit do not offer.This Brother DR-230CL drum unit is designed to print an estimated 15,000 pages per colour in its lifetime, for any of the Brother printers above.Our original Brother DR230CL colour drum units for this range of Brother printers are amongst the lowest priced on the Internet and carry a 100% satisfaction guarantee. All our prices include VAT and delivery so the price you see is the price you pay.