With an enormous 20,000 page yield from the original Samsung K659 and the rest of the 659 toner cartridge series, these genuine consumables offer a surprisingly low cost per page. The black  toner cartridge in the series, the CLT-K659S/ELS offers a quality of print that only Samsung can offer and is guaranteed to impress.The genuine Samsung K659 is compatible with the CLX-8640ND, CLX-8650ND and every other high quality laser printer found listed on this page. Whilst other alternatives to the CLT-K659S/ELS are in circulation, this original version come highly recommended for those who wish to invest in brand new Samsung products.