The genuine Kyocera 106R02720 is the cheapest way of getting the Xerox WorkCentre 3615 (and all other compatible printers) up and running with a genuine Kyocera toner cartridge. The respectable yield of 5,900 pages also makes it surprisingly reasonable.As a mono laser toner cartridge the Kyocera 106R02721 contains only top quality black toner powder. The genuine Kyocera toner powder found within the 106R02720 is capable off sharp lines and characters, gradual gradients and great expanses of solid black.