The Samsung 304L is a top quality black toner cartridge, guaranteed to give amazing results.Samsung have been creating some of the best black and white laser printers and toner cartridges for years, and this MLT-D304L high capacity toner cartridge is just another fine addition. With an estimated page yield of 20,000 prints and compatibility with the Samsung ProXpress SL-M4530NX (among others), the genuine MLT-D304L is stunning.Each original Samsung 304L toner cartridges is brand new, sealed and come with a full guarantee from the manufacturer themselves.