Toners for Brother TN 310, TN 315, TN 348 Black cartridges. Page yield 6K.To change a starter cartridge TN 310 into a TN 315, simply change the gears BRTN315BFGRCompatible laser printers:TN310BK (Low yield) and TN315BK (High yield) - Brother HL-4150 Series, HL-4570 Series, MFC-9460CDN, MFC-9560CDW, MFC-9970CDW.