Product Description: Cartridge yield (approx): DR-520 DR-620 Imaging Unit 26,000 pages per black at 5% coverage (Letter/A4，Not Toner) Our DR520 Imaging Unit Replacement for Brother HL-5240 HL-5250DN/DNT HL-5270DN HL-5280DW HL-5350DN/DNLT HL-5370DW/DWT HL-5380DN MFC-8370 MFC-8460N MFC-8470DN MFC-8480DN MFC-8660DN MFC-8670DN MFC-8680DN MFC-8690DN MFC-8860DN MFC-8870DW MFC-8880DN MFC-8890DW DCP-8060 DCP-8065DN DCP-8080DN DCP-8085DN Printer Reliable printing quality: Our DR520 DR620 imaging unit has a stable printing effect, high precision printing, to ensure the output quality, not easy to have problems. With environmental characteristics: Our DR520 DR620 imaging unit has environmental consciousness, using Replacement materials, low carbon and environmental protection, in line with environmental requirements. PRINT QUALITY: The DR520 DR620 Drum all use smart chips, which are designed to provide a precise amount of Drum on each page to maximize efficient printing