The Toner Refill Chip for Samsung CLP-300 allows you to refill your cartridge while maintaining the your printer's diagnostics to estimate the amount of toner remaining in the cartridge. The Toner Refill Chip for Samsung CLP-300 tells your printer that the cartridge is new or filled. All of our chips are easy to replace. Instructions are included in your SoHoJet Toner Refill Kit. You can expect the same amount of printed pages as with an original high capacity cartridge (7000 page yield black and 5000 page yield each color).