It is certified with ISO 9001 and ISO 14001 Page Yield: 2,600 Pages at 5% Coverage Quantity: 4PK TN450 Toners Condition:100% Brand New Print Technology: Laser Model: TN450 TN420 Warranty:1-Year Color: Black Toner:Using the finest toner to produce dense and prominent printing document. Developing Roller:Producing consistent and even printing with high density and firm fixing. Plastic Parts:Brand-new material, meetings ROHS Environmental Standards.