The TN-619 K (OEM part number A3VX150) is a genuine black toner cartridge from Konica Minolta designed for high-volume colour laser print systems—especially the bizhub/AccurioPress series (e.g., C1060, C1070 and related models).  It delivers a high page yield (around 66,500 pages at typical 5% coverage) under standard conditions, ensuring extended usage before replacement. Engineered for consistency, the TN-619 K works within the printer’s imaging system to maintain sharp black output, reducing output variation and downtime.