Advertised at 1500 pages per black cartridge. After 15 pages the cartridge reads 98%. At this rate there is no chance of reaching 1500. How much remains to be seen. Manufacturing cartridges have a control strip that must be removed before use. They are not on the cartridge received, slight shaking is aimed at dispersing the toner over the surrounding space. The toner lying on its side is heavier than the manufacturer's cartridges, so it has a slight curvature. The print quality is excellent. If they hold up as advertised I would buy them again.
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