Top Dog Compatible Replacement for Brother DR510 Drum Unit (20,000 Yield) COMPATIBILITY LIST: Brother DCP-8040 Brother DCP-8045D Brother HL-5140 Brother HL-5150D Brother HL-5170DN Brother MFC-8120 Brother MFC-8220 Brother MFC-8440 Brother MFC-8640D Brother MFC-8840D Brother MFC-8840DN WARRANTY: Lifetime/100% Satisfaction Guarantee, 24/7 Customer Support PAGE YIELD: 20,000 Pages based on 5% coverage of Letter/A4 PRODUCT TYPE: Alternative Replacement for OEM DR-510 Drum Unit PACKAGING: 1x Drum Unit