INK E-SALE 148X 148A Black Toner Cartridge High Yield (with Chip)Two high-yield black toner cartridges designed for specific HP Pro and MFP laser printers. Each cartridge includes a smart chip that displays ink levels and communicates with your printer's firmware. With a page yield of up to 9,500 pages per cartridge at 5% coverage, these are built for heavy-volume printing. The package includes two 148X toner cartridges and one user guide.These cartridges are compatible with HP Pro 4001, 4001n, 4001dw, 4001dn and MFP 4101, 4101fdn, 4101fdw models. They are not compatible with the HP Pro 4001ne, 4001dwe, 4001dne, or MFP 4101dwe, 4101fdne, 4101fdwe variants. Installation takes just seconds with no chip replacement needed. Important: do not run printer activation or firmware update programs while using these cartridges, as this can cause the printer to reject third-party toner.MPNtoner 148XItemweight5.35 poundsProductdimensions7.9 x 7.5 x 12.6 inches