HP 143A Black Original Neverstop Laser Toner Reload Kit (Yield ~2500
pages); HP 143AD Dual pack Black Original Neverstop Laser Toner Reload
Kit (Yield ~2x2500 pages); HP 144A Black Original Laser Imaging Drum
(includes ~5000 pages of inbox toner, useful life of ~20000 pages)
Declared black toner page yield value in accordance with ISO/IEC 19752
and continuous printing. Actual yields vary considerably based on images
printed and other factors.