This Oki 45439002 high capacity original black toner cartridge offers exceptional quality prints at a reasonable price. The black Oki 45439002 cartridge is filled using high quality Oki toner powder to ensure the very best quality prints available from your Oki mono laser printer. This genuine Oki 45439002 black toner cartridge is the only toner cartridge needed for the Oki B731dnw printer. Our price for the Oki 45439002 cartridge is amongst the lowest priced on the Internet and carry a 100% satisfaction guarantee. All our prices include VAT and delivery so the price you see is the price you pay.