The original 70C2HK0 is the most economic genuine black cartridge in the 702 range and our remanufactured alternative offers even greater .When remanufacturing with an original 70C2HK0 our partners retain many of the genuine components and then fill the unit with a quality compatible toner powder. The completed remanufactured 702HK toner cartridge is then compatible with all of the same printers including the CS310dn.