The Samsung MLT-D304S is a top quality black toner cartridge, guaranteed to give amazing results.Samsung have been creating some of the best monochromatic laser printers and toner cartridges for years, and this 304S black toner cartridge is just another fine addition. With an estimated page yield of 7,000 prints and compatibility with the Samsung ProXpress SL-M4583FX (among others), the genuine 304S is stunning.Each original Samsung MLT-D304S toner cartridges is brand new, sealed and come with a full guarantee from the manufacturer themselves.