Remark: 1.Our compatible chip can replace original chip for working on laser printer
2.If toner powders is used up,you need change chips for drum or both of OPC and
Drum.Some printer 's OPC and Drum is together,so it just for one chip,but some
printer's drum and OPC is separate,so you need change OPC Chip and Drum
Chip
3.You need clean leftover toner powders in drum by Vacuum Tube Cleaner,then
you can refill new good toner powders
