4 packs Drum Set 4 packs Drum Set: Brother DR520 (1 unit) + TN550 (3 Pcs) for HL-5240, ML-5250, ML-5250DN, ML-5250DNT, ML-5270DN, ML-5280, ML-5280DN, MFC-8460N, MFC-8660DN, MFC-8860DN, MFC-8870DW, Black color, DR-520 (25,000) + TN550 (7,000/ea) Page yield Manufactured In An ISO9001 Certified Factory To Meet International Standards 100% Satisfaction Guaranteed Sold by TonerPals