You can expect reliability with this Original Samsung K4072S (CLT-K4072S/ELS) Black toner cartridge, as it is a brand new product designed, manufactured and tested using Genuine Samsung parts. Samsung`s unique Toner formulation guarantees that this Genuine Black K4072S will produce high quality, high resolution prints for the life of the Cartridge.The Original Samsung K4072S (CLT-K4072S/ELS) Black toner cartridge will be compatible with various Samsung Printers, a full list of compatible Printers can be found on this page. The Genuine CLT-K4072S will need to be changed after roughly 1000 pages (based on a 5% coverage).