4 Drum Units, a Complete Set Compatible for DR223CL. Drum Units NOT Toner Cartridges For Use in Brother HL-L3210CW HL-L3230CDW HL-L3270CDW HL-L3290CDW and MFC-L3710CW MFC-L3750CDW MFC-L3770CDW Printers Page Yield: 18,000 Pages per Drum @ 5% Standard Coverage Rate On A4 Paper Size. Manufactured with the highest quality and standards by ISO, CE, & REACH manufacturer for best printing performance matching the standards of OEM. PRINTOXE® Brand 100% Compatible 4 Drum Units in Retail Package Shown in Image. Shelf Life exceeds 36 Months.