Compatible toner cartridge 52114502 for OKI page yield:17000 Factory directly sale Best ... .Colors of the toner for copier: black 3.Page yield: 17000 pages 4.type of the toner for ... two:During the production,every step will have print test to ensure each partes have well performanceStep three ... producion,all products are inspected by series procedures(print test,page yield test,lift span test and etc) 3 ...