Official Model & Yield: The primary model is DR-441CL (region-dependent, with DR-421CL also listed for these printers). According to Brother's official specifications, the yield is approximately 30,000 pages (based on 1 page per job, 5% coverage), but can reach up to 50,000 pages if printing 3 pages per job . Brother UK's product page also lists the drum unit as "50,000 pages (3 page/job)" .
Compatible Models: Fully compatible with the MFC-L8690CDW and MFC-L9570CDW you listed, as well as the HL-L8260CDW, HL-L8360CDW, HL-L9310CDW, and MFC-L8900CDW .
Product Form: This is typically a drum unit set containing four color drums (Black, Cyan, Magenta, Yellow) .
Important Note: Toner cartridges are not included and must be purchased separately. After replacement, you will typically need to reset the drum counter.
